Chenistry C2 question booklet part 1
|
|
|
- Lorin Pope
- 7 years ago
- Views:
Transcription
1 Chenistry C2 question booklet part 94 minutes 94 marks Page of 34
2 Q. The diagram represents a carbon atom. (a) Use words from the box to answer the questions. electron neutron nucleus proton (i) What is the name of the central part of the atom?... () What is the name of the particle with no charge?... () (iii) What is the name of the particle with a negative charge?... () Use the diagram above to help you to answer these questions. (i) Draw a ring around the atomic (proton) number of this carbon atom () Draw a ring around the mass number of this carbon atom () (c) A different carbon atom has 6 protons and 8 neutrons. Draw a ring around the symbol that represents this atom. () Page 2 of 34
3 (d) The diagram shows the bonding in a methane molecule. (i) Draw a ring around the chemical formula of a methane molecule. CH 4 CH 4 C 4 H () Draw a ring around the word that describes methane. compound element mixture () (iii) Draw a ring around the type of bonding in a methane molecule. covalent ionic metallic () (Total 9 marks) Q2. The picture shows sodium reacting with chlorine. The reaction forms sodium chloride. Page 3 of 34
4 (a) Use words from the box to answer the questions. compound element hydrocarbon mixture Which word best describes: (i) sodium... sodium chloride?... () () When sodium reacts with chlorine the sodium atoms change into sodium ions. The diagrams below represent a sodium atom and a sodium ion. Use the diagrams to help you explain how a sodium atom turns into a sodium ion. (2) (c) (i) The diagram below represents a chlorine atom. Page 4 of 34
5 When chlorine reacts with sodium the chlorine forms negative chloride ions. Complete the diagram below to show the outer electrons in a chloride ion (Cl ). () Chloride ions are strongly attracted to sodium ions in sodium chloride. Explain why () (Total 6 marks) Q3. The picture shows sodium reacting with chlorine. The reaction forms sodium chloride, which contains sodium ions and chloride ions. (a) The diagrams show how electrons are arranged in a sodium atom and a chlorine atom. Page 5 of 34
6 Explain, in terms of electrons, what happens when sodium reacts with chlorine. (3) Explain, as fully as you can, why sodium chloride has a high melting point. (3) (Total 6 marks) Q4. This question is about oxygen atoms. The periodic table on the Data Sheet may help you to answer this question. (a) (i) Oxygen atoms have 8 electrons. Complete the diagram to represent the arrangement of electrons in an oxygen atom. Use crosses ( ) to represent the electrons. () Name the part of the oxygen atom that is labelled A on the diagram.... () Page 6 of 34
7 Two isotopes of oxygen are oxygen-6 and oxygen O 8 8 O oxygen-6 oxygen-8 Explain, in terms of particles, how the nucleus of an oxygen-8 atom is different from the nucleus of an oxygen-6 atom (2) (Total 4 marks) Q5. Ammonia (NH 3 ) is an important chemical which is used to make fertilisers. Ammonia is made from nitrogen and hydrogen, (a) The diagrams represent the electron arrangements in atoms of nitrogen and hydrogen. Complete the diagram showing the arrangement of electrons in a molecule of ammonia. () Page 7 of 34
8 Name the type of bonding which holds the nitrogen and hydrogen atoms together in an ammonia molecule.... () (Total 2 marks) Q6. Calcium and magnesium are elements. They are found in the Earth s crust as compounds, often carbonates and sulphates. Magnesium is also found as its chloride. (a) Calcium and magnesium are in the same Group in the Periodic Table. State which Group this is.... () Use the Data Sheet to help you to answer this question. (i) Write the chemical formula of magnesium chloride.... () Name the type of bonding in magnesium chloride.... () (Total 3 marks) Q7. Distress flares are used to attract attention in an emergency. Flares often contain magnesium. Magnesium burns to form magnesium oxide. (a) The distress flare burns with a bright flame because the reaction is very exothermic. Complete the following sentence using the correct words from the box. gives out heat stores heat takes in heat An exothermic reaction is one which... () Page 8 of 34
9 The diagram shows the electronic structure of a magnesium atom. The atomic (proton) number of magnesium is 2. Magnesium atom The atomic (proton) number of oxygen is 8. Which diagram, A, B, C or D, shows the electronic structure of an oxygen atom? Diagram... () (c) Magnesium ions and oxide ions are formed when magnesium reacts with oxygen. The diagram shows the electronic structure of an oxide ion. Oxide ion Which diagram, J, K, L or M, shows the electronic structure of a magnesium ion? Diagram... () Page 9 of 34
10 (d) Indigestion tablets can be made from magnesium oxide. The magnesium oxide neutralises some of the hydrochloric acid in the stomach. Draw a ring around the name of the salt formed when magnesium oxide reacts with hydrochloric acid. magnesium chloride magnesium hydroxide magnesium sulfate () (Total 4 marks) Q8. Metal is bent and shaped to make a car body. The diagram below represents how atoms are arranged in a metal. Which two statements in the table best explain why the metal can be bent and shaped? Tick ( ) the two statements. Statement Tick ( ) The atoms are in layers. The metal is shiny. The atoms can slide over each other. All the atoms are linked by strong covalent bonds. (2) (Total 2 marks) Page 0 of 34
11 Q9. (a) Write a balanced symbol equation for the reaction between magnesium (Mg) and oxygen (O 2 ) to form magnesium oxide (MgO).... () The diagram shows the electronic structure of a magnesium atom. The atomic (proton) number of magnesium is 2. Magnesium atom Draw a similar diagram to show the electronic structure of an oxygen atom. The atomic (proton) number of oxygen is 8. () (c) Magnesium ions and oxide ions are formed when magnesium reacts with oxygen. The diagram shows the electronic structure of an oxide ion. Oxide ion Draw a similar diagram to show the electronic structure of a magnesium ion. () Page of 34
12 (d) Magnesium oxide is a white solid with a high melting point. Explain how the ions are held together in solid magnesium oxide (2) (e) Indigestion tablets can be made from magnesium oxide. The magnesium oxide neutralises some of the hydrochloric acid in the stomach. Complete the word equation for the reaction between magnesium oxide and hydrochloric acid. hydrochloric acid + magnesium oxide... + water. () (Total 6 marks) Q0. The diagram represents a particle of methane. (a) What is the formula of methane?... () Choose a word from the box to answer the question. atom ion molecule Which of the words best describes the methane particle shown in the diagram?... () Page 2 of 34
13 (c) Choose a word from the box to answer the question. covalent ionic metallic What is the type of bonding shown in the diagram?... () (Total 3 marks) Q. (a) The diagram represents an atom of nitrogen. (i) Use words from the box to label the diagram. electron neutron nucleus proton (2) Draw a ring around the mass number of this atom () Page 3 of 34
14 Nitrogen can react with hydrogen to make ammonia, NH 3. Which diagram, A, B, C or D, best represents an ammonia molecule? () (Total 4 marks) Q2. This question is about sodium chloride (common salt) which is an important chemical. Sodium chloride can be made by burning sodium in chlorine gas. (a) Balance the symbol equation for the reaction of sodium with chlorine. Na(s) + Cl 2 (g) NaCl(s) () Page 4 of 34
15 (i) Complete the diagrams below to show the electronic structures of a sodium and a chlorine atom. (Atomic number of sodium = and chlorine = 7.) (3) When sodium reacts with chlorine the sodium atoms are changed into sodium ions (Na + ) and the chlorine atoms are changed into chlorine ions (Cl ). Explain how:. a sodium atom changes into a sodium ion; (2) 2. a chlorine atom changes into a chloride ion (2) (c) The element potassium is in the same group of the Periodic Table as sodium. Potassium reacts with chlorine to make potassium chloride which is sometimes used instead of common salt in cooking. (i) Predict the formula of potassium chloride.... () By reference to the electronic structures of potassium and sodium explain: Why the reaction of potassium with chlorine is similar to the reaction of sodium with chlorine () Page 5 of 34
16 (d) The electrolysis of sodium chloride solution is an important industrial process. The diagrams below show two experiments set up during an investigation of the electrolysis of sodium chloride. (i) What would be the reading on the ammeter in experiment?... A Explain your answer (3) (e) The equations below show the reactions which take place in experiment 2. H 2 O() H + (aq) + OH (aq) 2H + (aq) + 2e H 2 (g) 2Cl (aq) 2e Cl 2 (g) (i) Which substance provides hydrogen ions?... () Name the product formed at: (A) the positive electrode;... (B) the negative electrode.... () (Total 5 marks) Page 6 of 34
17 Q3. (a) The electronic structure of a sodium atom can be written 2,8,. Write the electronic structure of a potassium atom in the same way.... () The electronic structure of a sodium atom can also be represented as in the diagram below. (i) Draw a similar diagram for a fluorine atom. Draw similar diagrams to show the electronic structure of the particles in sodium fluoride. (4) (Total 5 marks) Q4. Hydrogen chloride (HCl) can be made by the reaction of hydrogen (H 2 ) with chlorine (Cl 2 ). (a) The diagrams represent molecules of hydrogen and chlorine. Page 7 of 34
18 Draw a similar diagram to represent a molecule of hydrogen chloride (HCl). You need show only the outer energy level (shell) electrons. () The word equation for the reaction of hydrogen with chlorine is shown below. hydrogen + chlorine hydrogen chloride Write a balanced symbol equation for this reaction.... (2) (c) Hydrogen chloride gas reacts with magnesium to form the ionic compound called magnesium chloride. Use the table of ions on the Data Sheet to help you to write the formula of magnesium chloride.... () (d) Why does magnesium chloride have a much higher melting point than hydrogen chloride? (2) (Total 6 marks) Page 8 of 34
19 Q5. Millions of years ago the Earth formed as a giant ball of molten rock. The outer surface cooled forming a thin, solid outer crust. Volcanic activity on the surface produced an atmosphere containing the compounds carbon dioxide, ammonia, methane and water vapour. Describe the bonding in any one of these compounds. You must include electronic structures in your explanation (Total 4 marks) Q6. Sodium reacts with chlorine to form the compound sodium chloride. 2Na + Cl 2 2NaCl Describe, in terms of electron arrangement, the type of bonding in: (i) a molecule of chlorine; (3) Page 9 of 34
20 the compound sodium chloride (4) (Total 7 marks) Q7. Sodium chloride is a raw material. (a) The electronic structure of a sodium atom is shown below. Complete the diagram for the electronic structure of a chlorine atom. A chlorine atom has 7 electrons. () When sodium and chlorine react to form sodium chloride they form sodium ions (Na + ) and chloride ions (Cl ). How does a sodium atom change into a sodium ion? (2) Page 20 of 34
21 (c) The diagram shows apparatus used in a school laboratory for the electrolysis of sodium chloride solution. The solution contains sodium ions (Na + ), chloride ions (Cl ), hydrogen ions (H + ) and hydroxide ions (OH ). (i) Why do chloride ions move to the positive electrode?... () Name the gas formed at the negative electrode.... () (d) Chlorine and chlorine compounds are used to bleach wood pulp that is used to make paper. The article below is from a newspaper. Local people have been protesting outside a paper factory. They say: We want the company to stop using chlorine compounds. Chlorine compounds release poisons into the environment. The company should use safer compounds. The company replied: Chlorine has been used safely for many years to treat drinking water. Only tiny amounts of chlorine are released, which cause no harm. Using other compounds will be more expensive and may put us out of business. (i) Why are some local people worried about the use of chlorine compounds? () Why might other local people want the company to continue to use chlorine compounds? () Page 2 of 34
22 (iii) It is decided to have an inquiry. Why should this be done by independent scientists? () (Total 8 marks) Page 22 of 34
23 (d) (i) CH 4 M. (a) (i) nucleus (iii) neutron electron (i) 6 2 (c) compound (iii) covalent [9] M2. (a) (i) element compound an / one electron from the sodium atom is lost / transferred to form a sodium ion (c) (i) 8 electrons drawn on outer energy level / shell Page 23 of 34
![because oppositely charged ions attract each other or because chloride ions are negative and sodium ions are positive [6] M3.](/docs-images/48/24408922/images/24-0.png "(a) the sodium atom loses / transfers an / one electron the chlorine atom gain(s) this / an / one electron involves electrons in the outer energy levels / shells of both the sodium atom and the")
24 because oppositely charged ions attract each other or because chloride ions are negative and sodium ions are positive [6] M3. (a) the sodium atom loses / transfers an / one electron the chlorine atom gain(s) this / an / one electron involves electrons in the outer energy levels / shells of both the sodium atom and the chlorine atom sodium chloride has a giant structure / lattice of oppositely charged ions / positive and negative ions the electrostatic forces of attraction / bonds between ions are strong therefore sodium chloride has a high melting point because a large amount of energy is needed to make the ions mobile [6] M4. (a) (i) or allow any arrangement of electrons on the shells accept o, x, - or e as representing electrons nucleus accept nucleus (protons plus neutrons) do not accept protons plus neutrons on its own allow nuclei / nucles / neucleus / phonetic spelling do not accept neutron Page 24 of 34
25 it has 2 more neutrons or converse accept it has more neutrons or different number of neutrons for mark 2 more protons / electrons + correct number of neutrons = max mark or O-6 has 8 neutrons ( mark)(*) O-8 has 0 neutrons ( mark)(*) (*)if incorrectly calculated but shows more neutrons in 0-8 allow for mark accept it has more particles or it has 2 more particles for mark ignore any reference to charges just 2 more without reference to particles = 0 marks 2 [4] M5. (a) all electrons correct (inner shell need not be shown) three bond pairs and two electrons anywhere else can use dots, crosses or e s in any combination covalent accept phonetic spelling do not accept convalent [2] M6. (a) Group 2 / Alkaline Earth Metals for mark (i) MgCl 2 /Mg 2+ (Cl ) 2 (or equation with correct answer) for mark ionic / electrovalent for mark [3] Page 25 of 34
26 M7. (a) gives out (heat) D (c) L (d) magnesium chloride [4] M8. the atoms are in layers the atoms can slide over each other [2] M9. (a) 2Mg + O 2 2MgO accept correct multiples / fractions electrons do not need to be paired accept dots / circles / e instead of crosses do not allow 2.6 without diagram Page 26 of 34
27 (c) (d) electrons do not need to be paired allow without bracket s/ must have the charge accept dots / circles / e instead of crosses ignore extra empty outer shells ignore nucleus do not allow [2.8] 2+ without diagram oppositely charged (ions / atoms) allow positive and negative(ions / atoms) (they) attract must be in correct context accept held by electrostatic forces ignore ionic bonding maximum if they refer to intermolecular forces / attractions / covalent bonds (e) magnesium chloride accept MgCl 2 (if correctly written) [6] M0. (a) CH 4 4 should be below halfway up H / tail of 4 below the dotted line molecule (c) covalent [3] Page 27 of 34
![M. (a) (i) all three correct 2 marks one correct mark 2 4 A [4] M2. (a) 2 2 multiples of ½ allowed for mark (i) 2. 8.](/docs-images/48/24408922/images/28-0.png "and 2. 8.")
28 M. (a) (i) all three correct 2 marks one correct mark 2 4 A [4] M2. (a) 2 2 multiples of ½ allowed for mark (i) and gains 3 marks mark for 2 electrons in each inner shell mark for 8 electrons in each second shell mark for electron in sodium outer shell and 7 in chlorine outer shell 3 sodium atom loses; electron; chlorine atom gains; electron for mark each inversion = 2 marks lose negative charge = mark 4 (c) (i) KCl (accept 2KCl) for mark both have on electron in outer shell/same number of electrons/ lose same number of electrons in compound formation/ both lose one electron for mark Page 28 of 34
![(d) 0 amps; the ions; cannot move in the solid solid Na chloride does not conduct for mark each 3 (e) (i) water (H 2 O) for mark () chlorine; (2) hydrogen for mark [5] M3.](/docs-images/48/24408922/images/29-0.png "(a) 2, 8, 8, for mark for mark Ignore symbol in middle but structure must be drawn NOT 2,7 If covalent; can score mark for changes but not for diagram Arrow showing electron transfer from metal atom")
29 (d) 0 amps; the ions; cannot move in the solid solid Na chloride does not conduct for mark each 3 (e) (i) water (H 2 O) for mark () chlorine; (2) hydrogen for mark [5] M3. (a) 2, 8, 8, for mark for mark Ignore symbol in middle but structure must be drawn NOT 2,7 If covalent; can score mark for changes but not for diagram Arrow showing electron transfer from metal atom to non-metal atom = 2 marks If the ions are not identified then cannot score mark for changes 4 [5] Page 29 of 34
30 M4. (a) bonding pair in the overlap and 6 other electrons arranged around the chlorine must have either circles or symbols need not be pairs but must not be in the overlap region accept without H and Cl if clear accept all x s or all o s H 2 + Cl 2 2HCl accept multiples or fractions accept correct formulae but not balanced for mark correctly balanced equation containing correct lower / upper case symbols gets mark 2 (c) MgCl 2 accept Mg 2+ (Cl - ) 2 (d) because magnesium chloride is made of ions or is ionic accept there are strong forces of attraction between the ions / particles in MgCl 2 or strong electrostatic attractions accept more energy to separate particles in MgCl 2 do not accept MgCl 2 molecules do not accept reference to breaking bonds hydrogen chloride is made of molecules or is covalent accept there are only weak forces of attraction (between the particles / molecules) in HCl do not accept weak covalent bonds do not accept reference to breaking bonds do not accept MgCl 2 is a solid and HCl is a gas [6] Page 30 of 34
31 M5. answers apply to: accept diagrams and/or descriptions carbon dioxide CO 2 ammonia NH 3 methane CH 4 water H 2 O *outer electronic structure of one atom correct or needs correct number of electrons to complete outer shell *outer electronic structure of other atom correct or needs correct number of electrons to complete outer shell *one shared pair of electrons (as one covalent bond) use of ions or reference to ionic bonding negates this mark *outer electronic structure of compound correct or each atom now has a full outer shell/noble gas electron structure [4] M6. (i) can be from diagram chlorine (2.8).7. accept chlorine needs one more electron can be from diagram shares a pair of electrons shared pair of electrons is a covalent bond do not accept ionic bond Page 3 of 34
32 can be from diagram and appropriately annotated sodium (2.8).. and chlorine (2.8).7 sodium loses one electron and chlorine gains one electron Na + and Cl formed bond formed between oppositely charged ions or ionic bond is formed do not accept covalent bond [7] M7. (a) accept dots / crosses / e must be drawn on diagram electrons do not need to be paired ignore brackets or + or -charges ignore 2,8,7 (one) electron recognition that electrons are involved lost / given away / transferred from sodium / transferred to chlorine owtte must be linked to electrons accept loses electron(s) for 2 marks NB loses 2 or more electrons gains mark reference to sharing / covalent max mark ignore charges on ions formed (c) (i) any one from: ions / atoms / they are / it is negatively charged / anions accept they are negative opposite (charges) attract accept they are attracted or it is oppositely charged ignore opposite forces attract Page 32 of 34
33 hydrogen accept H 2 ignore H or H + (d) (i) poisons released into environment (owtte) accept any sensible idea of harm / harmful / poisons / poisonous / pollution / damaging do not accept answers such as global warming / ozone layer etc. ignore safety unless qualified any one sensible idea eg loss of work / unemployment eg shops / house prices etc. or company goes out of business any adverse effect on local economy (owtte) any adverse effect on paper production / cost of paper / cost of water (treatment) allow less expensive to use chlorine or converse chlorine (compounds) have been used (for many years) without causing harm owtte only a tiny amount of chlorine is released so it would not cause harm ignore uses of chlorine to treat drinking water unless qualified (iii) ideas related to bias accept more reliable or valid or fair ignore more accurate / fair test [8] Page 33 of 34
34 Page 34 of 34
WRITING CHEMICAL FORMULA
WRITING CHEMICAL FORMULA For ionic compounds, the chemical formula must be worked out. You will no longer have the list of ions in the exam (like at GCSE). Instead you must learn some and work out others.
7.4. Using the Bohr Theory KNOW? Using the Bohr Theory to Describe Atoms and Ions
7.4 Using the Bohr Theory LEARNING TIP Models such as Figures 1 to 4, on pages 218 and 219, help you visualize scientific explanations. As you examine Figures 1 to 4, look back and forth between the diagrams
Name Class Date. What is ionic bonding? What happens to atoms that gain or lose electrons? What kinds of solids are formed from ionic bonds?
CHAPTER 1 2 Ionic Bonds SECTION Chemical Bonding BEFORE YOU READ After you read this section, you should be able to answer these questions: What is ionic bonding? What happens to atoms that gain or lose
Test Bank - Chapter 4 Multiple Choice
Test Bank - Chapter 4 The questions in the test bank cover the concepts from the lessons in Chapter 4. Select questions from any of the categories that match the content you covered with students. The
Instructions Answer all questions in the spaces provided. Do all rough work in this book. Cross through any work you do not want to be marked.
GCSE CHEMISTRY Higher Tier Chemistry 1H H Specimen 2018 Time allowed: 1 hour 45 minutes Materials For this paper you must have: a ruler a calculator the periodic table (enclosed). Instructions Answer all
List the 3 main types of subatomic particles and indicate the mass and electrical charge of each.
Basic Chemistry Why do we study chemistry in a biology course? All living organisms are composed of chemicals. To understand life, we must understand the structure, function, and properties of the chemicals
Cambridge International Examinations Cambridge International General Certificate of Secondary Education
Cambridge International Examinations Cambridge International General Certificate of Secondary Education *0123456789* CHEMISTRY 0620/03 Paper 3 Theory (Core) For Examination from 2016 SPECIMEN PAPER 1 hour
Exampro GCSE Chemistry
Exampro GCSE Chemistry C2 Chapter 5 Higher Name: Class: Author: Date: Time: 73 Marks: 73 Comments: Page of 27 Q. (a) In this question you will be assessed on using good English, organising information
ANSWER KEY. Energy Levels, Electrons and IONIC Bonding It s all about the Give and Take!
ANSWER KEY Energy Levels, Electrons and IONIC Bonding It s all about the Give and Take! From American Chemical Society Middle School Chemistry Unit: Chapter 4 Content Statements: Distinguish the difference
Chemistry Assessment Unit AS 1
Centre Number 71 Candidate Number ADVANCED SUBSIDIARY (AS) General Certificate of Education January 2011 Chemistry Assessment Unit AS 1 assessing Basic Concepts in Physical and Inorganic Chemistry [AC111]
Candidate Style Answer
Candidate Style Answer Chemistry A Unit F321 Atoms, Bonds and Groups High banded response This Support Material booklet is designed to accompany the OCR GCE Chemistry A Specimen Paper F321 for teaching
Lewis Dot Structures of Atoms and Ions
Why? The chemical properties of an element are based on the number of electrons in the outer shell of its atoms. We use Lewis dot structures to map these valence electrons in order to identify stable electron
HIGHER TIER CHEMISTRY MINI-MOCK UNIT 2 [C2.1, C2.2&C2.3, C2.4, C2.5, C2.6 and C2.7] (a) Name particles X and Y.
![HIGHER TIER CHEMISTRY MINI-MOCK UNIT 2 [C2.1, C2.2&C2.3, C2.4, C2.5, C2.6 and C2.7] (a) Name particles X and Y.](/thumbs/40/21177375.jpg "HIGHER TIER CHEMISTRY MINI-MOCK UNIT 2 [C2.1, C2.2&C2.3, C2.4, C2.5, C2.6 and C2.7] (a) Name particles X and Y.")
HIGHER TIER CHEMISTRY MINI-MOCK UNIT 2 [C2., C2.2&C2.3, C2.4, C2.5, C2.6 and C2.7] C2. Structure and Bonding Questions Q. The diagram shows a model of part of the giant lattice of a metal. (a) Name particles
In the box below, draw the Lewis electron-dot structure for the compound formed from magnesium and oxygen. [Include any charges or partial charges.
Name: 1) Which molecule is nonpolar and has a symmetrical shape? A) NH3 B) H2O C) HCl D) CH4 7222-1 - Page 1 2) When ammonium chloride crystals are dissolved in water, the temperature of the water decreases.
Questions Q1. Lithium, sodium and potassium are metals in group 1 of the periodic table. They are good conductors of heat and electricity. The freshly-cut metals are shiny. (a) (i) Give another physical
Bonding Practice Problems
NAME 1. When compared to H 2 S, H 2 O has a higher 8. Given the Lewis electron-dot diagram: boiling point because H 2 O contains stronger metallic bonds covalent bonds ionic bonds hydrogen bonds 2. Which
Specimen Paper. Time allowed! 60 minutes
Centre Number Surname Candidate Number Specimen Paper For Examiner s Use Other Names Candidate Signature Examiner s Initials General Certificate of Secondary Education Foundation Tier Question 1 Mark Chemistry
Molecular Models in Biology
Molecular Models in Biology Objectives: After this lab a student will be able to: 1) Understand the properties of atoms that give rise to bonds. 2) Understand how and why atoms form ions. 3) Model covalent,
Chemistry Post-Enrolment Worksheet
Name: Chemistry Post-Enrolment Worksheet The purpose of this worksheet is to get you to recap some of the fundamental concepts that you studied at GCSE and introduce some of the concepts that will be part
20.2 Chemical Equations
All of the chemical changes you observed in the last Investigation were the result of chemical reactions. A chemical reaction involves a rearrangement of atoms in one or more reactants to form one or more
Atomic Structure. Same atomic number Different mass number
Mass number Number of protons and neutrons Atomic number Number of protons Atomic Structure Cl 35 17 Atoms of the same element can have different numbers of neutrons - these atoms are called isotopes of
Coimisiún na Scrúduithe Stáit State Examinations Commission
2015. M33 Coimisiún na Scrúduithe Stáit State Examinations Commission LEAVING CERTIFICATE EXAMINATION, 2015 CHEMISTRY ORDINARY LEVEL TUESDAY, 16 JUNE AFTERNOON 2.00 TO 5.00 400 MARKS Answer eight questions
Chapter 16: Tests for ions and gases
The position of hydrogen in the reactivity series Hydrogen, although not a metal, is included in the reactivity series because it, like metals, can be displaced from aqueous solution, only this time the
Chapter 5 TEST: The Periodic Table name
Chapter 5 TEST: The Periodic Table name HPS # date: Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The order of elements in the periodic table is based
hij GCSE Additional Science Chemistry 2 Higher Tier Chemistry 2H SPECIMEN MARK SCHEME Version 1.0
hij GCSE Additional Science Chemistry 2 Higher Tier Chemistry 2H SPECIMEN MARK SCHEME Version.0 Copyright 20 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA)
Chapter 2 The Chemical Context of Life
Chapter 2 The Chemical Context of Life Multiple-Choice Questions 1) About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living
Chapter 6 Assessment. Name: Class: Date: ID: A. Multiple Choice Identify the choice that best completes the statement or answers the question.
Name: Class: Date: ID: A Chapter 6 Assessment Multiple Choice Identify the choice that best completes the statement or answers the question. 1. When an atom loses an electron, it forms a(n) a. anion. c.
Chapter 2: The Chemical Context of Life
Chapter 2: The Chemical Context of Life Name Period This chapter covers the basics that you may have learned in your chemistry class. Whether your teacher goes over this chapter, or assigns it for you
Ionic and Covalent Bonds
Ionic and Covalent Bonds Ionic Bonds Transfer of Electrons When metals bond with nonmetals, electrons are from the metal to the nonmetal The becomes a cation and the becomes an anion. The between the cation
Q1. A student studied the reaction between dilute hydrochloric acid and an excess of calcium carbonate.
Q. A student studied the reaction between dilute hydrochloric acid and an excess of calcium carbonate. calcium carbonate + hydrochloric acid calcium chloride + water + carbon dioxide The student measured
Unit 1 Chemical Changes and Structure Revision Notes
Unit 1 Revision Notes Rates of reaction The rate of reaction can be increased by: increasing the concentration of a solution decreasing the particle size of a solid increasing the temperature adding a
Which substance contains positive ions immersed in a sea of mobile electrons? A) O2(s) B) Cu(s) C) CuO(s) D) SiO2(s)
BONDING MIDTERM REVIEW 7546-1 - Page 1 1) Which substance contains positive ions immersed in a sea of mobile electrons? A) O2(s) B) Cu(s) C) CuO(s) D) SiO2(s) 2) The bond between hydrogen and oxygen in
Chemistry Diagnostic Questions
Chemistry Diagnostic Questions Answer these 40 multiple choice questions and then check your answers, located at the end of this document. If you correctly answered less than 25 questions, you need to
Question Bank Electrolysis
Question Bank Electrolysis 1. (a) What do you understand by the terms (i) electrolytes (ii) non-electrolytes? (b) Arrange electrolytes and non-electrolytes from the following substances (i) sugar solution
Chapter 8: Chemical Equations and Reactions
Chapter 8: Chemical Equations and Reactions I. Describing Chemical Reactions A. A chemical reaction is the process by which one or more substances are changed into one or more different substances. A chemical
Amount of Substance. http://www.avogadro.co.uk/definitions/elemcompmix.htm
Page 1 of 14 Amount of Substance Key terms in this chapter are: Element Compound Mixture Atom Molecule Ion Relative Atomic Mass Avogadro constant Mole Isotope Relative Isotopic Mass Relative Molecular
Specimen Paper. Chemistry 1F. Time allowed! 60 minutes
Centre Number Surname Candidate Number Specimen Paper For Examiner s Use Other Names Candidate Signature Examiner s Initials General Certificate of Secondary Education Foundation Tier Question 1 Mark Science
Unit 6 The Mole Concept
Chemistry Form 3 Page 62 Ms. R. Buttigieg Unit 6 The Mole Concept See Chemistry for You Chapter 28 pg. 352-363 See GCSE Chemistry Chapter 5 pg. 70-79 6.1 Relative atomic mass. The relative atomic mass
A mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together is called a(n)
Chemistry I ATOMIC BONDING PRACTICE QUIZ Mr. Scott Select the best answer. 1) A mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together is
IB Chemistry. DP Chemistry Review
DP Chemistry Review Topic 1: Quantitative chemistry 1.1 The mole concept and Avogadro s constant Assessment statement Apply the mole concept to substances. Determine the number of particles and the amount
Science 20. Unit A: Chemical Change. Assignment Booklet A1
Science 20 Unit A: Chemical Change Assignment Booklet A FOR TEACHER S USE ONLY Summary Teacher s Comments Chapter Assignment Total Possible Marks 79 Your Mark Science 20 Unit A: Chemical Change Assignment
CHEMISTRY BONDING REVIEW
Answer the following questions. CHEMISTRY BONDING REVIEW 1. What are the three kinds of bonds which can form between atoms? The three types of Bonds are Covalent, Ionic and Metallic. Name Date Block 2.
Atomic Structure. Name Mass Charge Location Protons 1 +1 Nucleus Neutrons 1 0 Nucleus Electrons 1/1837-1 Orbit nucleus in outer shells
Atomic Structure called nucleons Name Mass Charge Location Protons 1 +1 Nucleus Neutrons 1 0 Nucleus Electrons 1/1837-1 Orbit nucleus in outer shells The number of protons equals the atomic number This
CHAPTER 6 Chemical Bonding
CHAPTER 6 Chemical Bonding SECTION 1 Introduction to Chemical Bonding OBJECTIVES 1. Define Chemical bond. 2. Explain why most atoms form chemical bonds. 3. Describe ionic and covalent bonding.. 4. Explain
Balancing Chemical Equations Worksheet
Balancing Chemical Equations Worksheet Student Instructions 1. Identify the reactants and products and write a word equation. 2. Write the correct chemical formula for each of the reactants and the products.
Chapter 2 Atoms, Molecules, and Ions
Chapter 2 Atoms, Molecules, and Ions 1. Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon for every 4.00 g of hydrogen, a ration of 3:1 by mass. In ethane,
Name Block Date Ch 17 Atomic Nature of Matter Notes Mrs. Peck. atoms- the smallest particle of an element that can be identified with that element
Name Block Date Ch 17 Atomic Nature of Matter Notes Mrs. Peck atoms- the smallest particle of an element that can be identified with that element are the building blocks of matter consists of protons and
Getting the most from this book...4 About this book...5
Contents Getting the most from this book...4 About this book....5 Content Guidance Topic 1 Atomic structure and the periodic table...8 Topic 2 Bonding and structure...14 Topic 2A Bonding....14 Topic 2B
(1) e.g. H hydrogen that has lost 1 electron c. anion - negatively charged atoms that gain electrons 16-2. (1) e.g. HCO 3 bicarbonate anion
GS106 Chemical Bonds and Chemistry of Water c:wou:gs106:sp2002:chem.wpd I. Introduction A. Hierarchy of chemical substances 1. atoms of elements - smallest particles of matter with unique physical and
The Periodic Table: Periodic trends
Unit 1 The Periodic Table: Periodic trends There are over one hundred different chemical elements. Some of these elements are familiar to you such as hydrogen, oxygen, nitrogen and carbon. Each one has
Chapter 1: Moles and equations. Learning outcomes. you should be able to:
Chapter 1: Moles and equations 1 Learning outcomes you should be able to: define and use the terms: relative atomic mass, isotopic mass and formula mass based on the 12 C scale perform calculations, including
PROTONS AND ELECTRONS
reflect Imagine that you have a bowl of oranges, bananas, pineapples, berries, pears, and watermelon. How do you identify each piece of fruit? Most likely, you are familiar with the characteristics of
Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
Introduction to Chemistry Exam 2 Practice Problems 1 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1.Atoms consist principally of what three
Lewis Dot Notation Ionic Bonds Covalent Bonds Polar Covalent Bonds Lewis Dot Notation Revisited Resonance
Lewis Dot Notation Ionic Bonds Covalent Bonds Polar Covalent Bonds Lewis Dot Notation Revisited Resonance Lewis Dot notation is a way of describing the outer shell (also called the valence shell) of an
Coimisiún na Scrúduithe Stáit State Examinations Commission
Coimisiún na Scrúduithe Stáit State Examinations Commission LEAVING CERTIFICATE EXAMINATION, 2007 CHEMISTRY - ORDINARY LEVEL TUESDAY, 19 JUNE AFTERNOON 2.00 TO 5.00 400 MARKS Answer eight questions in
Chemical Building Blocks: Chapter 3: Elements and Periodic Table
Name: Class: Date: Chemical Building Blocks: Chapter 3: Elements and Periodic Table Study Guide Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
Untitled Document. 1. Which of the following best describes an atom? 4. Which statement best describes the density of an atom s nucleus?
Name: Date: 1. Which of the following best describes an atom? A. protons and electrons grouped together in a random pattern B. protons and electrons grouped together in an alternating pattern C. a core
C4 Revision Questions Bumper Pack
C4 Revision Questions Bumper Pack You will need a Periodic Table to answer these questions!! C4a Atomic structure 1. Write down a definition of an element. 2. Write down: a) the approximate radius of an
Chemical Calculations: Formula Masses, Moles, and Chemical Equations
Chemical Calculations: Formula Masses, Moles, and Chemical Equations Atomic Mass & Formula Mass Recall from Chapter Three that the average mass of an atom of a given element can be found on the periodic
ATOMS. Multiple Choice Questions
Chapter 3 ATOMS AND MOLECULES Multiple Choice Questions 1. Which of the following correctly represents 360 g of water? (i) 2 moles of H 2 0 (ii) 20 moles of water (iii) 6.022 10 23 molecules of water (iv)
ACIDS, BASES AND SALTS
Acids are those chemical substances which have a sour taste. Bases are those chemical substances which have a bitter taste. A salt is an ionic compound which dissociates to yield a positive ion other than
Cambridge International Examinations Cambridge International General Certificate of Secondary Education
ambridge International Examinations ambridge International General ertificate of Secondary Education *012345678* EMISTRY 0620/01 Paper 1 Multiple hoice (ore) For Examination from 2016 SPEIMEN PPER dditional
CP Chemistry Review for Stoichiometry Test
CP Chemistry Review for Stoichiometry Test Stoichiometry Problems (one given reactant): 1. Make sure you have a balanced chemical equation 2. Convert to moles of the known substance. (Use the periodic
The energy level diagram for this reaction is shown below.
Q. Methanol can be made when methane reacts with oxygen. (a) The energy level diagram for this reaction is shown below. (i) What is the energy change represented by A? () (ii) Use the energy level diagram
Topic 4 National Chemistry Summary Notes. Formulae, Equations, Balancing Equations and The Mole
Topic 4 National Chemistry Summary Notes Formulae, Equations, Balancing Equations and The Mole LI 1 The chemical formula of a covalent molecular compound tells us the number of atoms of each element present
Chemical Equations and Chemical Reactions. Chapter 8.1
Chemical Equations and Chemical Reactions Chapter 8.1 Objectives List observations that suggest that a chemical reaction has taken place List the requirements for a correctly written chemical equation.
Exam 2 Chemistry 65 Summer 2015. Score:
Name: Exam 2 Chemistry 65 Summer 2015 Score: Instructions: Clearly circle the one best answer 1. Valence electrons are electrons located A) in the outermost energy level of an atom. B) in the nucleus of
Ionic and Metallic Bonding
Ionic and Metallic Bonding BNDING AND INTERACTINS 71 Ions For students using the Foundation edition, assign problems 1, 3 5, 7 12, 14, 15, 18 20 Essential Understanding Ions form when atoms gain or lose
Electrons in Atoms & Periodic Table Chapter 13 & 14 Assignment & Problem Set
Electrons in Atoms & Periodic Table Name Warm-Ups (Show your work for credit) Date 1. Date 2. Date 3. Date 4. Date 5. Date 6. Date 7. Date 8. Electrons in Atoms & Periodic Table 2 Study Guide: Things You
Chemical Reactions in Water Ron Robertson
Chemical Reactions in Water Ron Robertson r2 f:\files\courses\1110-20\2010 possible slides for web\waterchemtrans.doc Properties of Compounds in Water Electrolytes and nonelectrolytes Water soluble compounds
Paper 1 (7405/1): Inorganic and Physical Chemistry Mark scheme
AQA Qualifications A-level Chemistry Paper (7405/): Inorganic and Physical Chemistry Mark scheme 7405 Specimen paper Version 0.5 MARK SCHEME A-level Chemistry Specimen paper 0. This question is marked
Periodic Table Questions
Periodic Table Questions 1. The elements characterized as nonmetals are located in the periodic table at the (1) far left; (2) bottom; (3) center; (4) top right. 2. An element that is a liquid at STP is
B) atomic number C) both the solid and the liquid phase D) Au C) Sn, Si, C A) metal C) O, S, Se C) In D) tin D) methane D) bismuth B) Group 2 metal
1. The elements on the Periodic Table are arranged in order of increasing A) atomic mass B) atomic number C) molar mass D) oxidation number 2. Which list of elements consists of a metal, a metalloid, and
Notes Chapter 9 Limiting Reagent Sample Problems Page 1
Notes Chapter 9 Limiting Reagent Sample Problems Page 1 Problem 1: Sodium chloride can be prepared by the reaction of sodium metal with chlorine gas. Suppose that 6.70 Na reacts with 3.20 Cl 2. A. What
EDEXCEL IGCSE chemistry (separate award)
EDEXCEL IGCSE chemistry (separate award) Section 1: Principles of chemistry a) States of matter 1.1 understand the arrangement, movement and energy of the particles in each of the three states of matter:
Cambridge International Examinations Cambridge International General Certificate of Secondary Education
Cambridge International Examinations Cambridge International General Certificate of Secondary Education *0123456789* CHEMISTRY 0620/04 Paper 4 Theory (Extended) For Examination from 2016 SPECIMEN PAPER
4.5 Physical Properties: Solubility
4.5 Physical Properties: Solubility When a solid, liquid or gaseous solute is placed in a solvent and it seems to disappear, mix or become part of the solvent, we say that it dissolved. The solute is said
neutrons are present?
AP Chem Summer Assignment Worksheet #1 Atomic Structure 1. a) For the ion 39 K +, state how many electrons, how many protons, and how many 19 neutrons are present? b) Which of these particles has the smallest
GCE Chemistry A. Mark Scheme for June 2014. Unit F321: Atoms, Bonds and Groups. Advanced Subsidiary GCE. Oxford Cambridge and RSA Examinations
GCE Chemistry A Unit F321: Atoms, Bonds and Groups Advanced Subsidiary GCE Mark Scheme for June 2014 Oxford Cambridge and RSA Examinations OCR (Oxford Cambridge and RSA) is a leading UK awarding body,
Stoichiometry Review
Stoichiometry Review There are 20 problems in this review set. Answers, including problem set-up, can be found in the second half of this document. 1. N 2 (g) + 3H 2 (g) --------> 2NH 3 (g) a. nitrogen
6 Reactions in Aqueous Solutions
6 Reactions in Aqueous Solutions Water is by far the most common medium in which chemical reactions occur naturally. It is not hard to see this: 70% of our body mass is water and about 70% of the surface
Proton Neutron Electron Relative Charge +1 0-1 Relative Mass 1 1 1/2000
Atomic Structure (a) describe protons, neutrons and electrons in terms of relative charge and relative mass; Proton Neutron Electron Relative Charge +1 0-1 Relative Mass 1 1 1/2000 (b) describe the distribution
100% ionic compounds do not exist but predominantly ionic compounds are formed when metals combine with non-metals.
2.21 Ionic Bonding 100% ionic compounds do not exist but predominantly ionic compounds are formed when metals combine with non-metals. Forming ions Metal atoms lose electrons to form +ve ions. Non-metal
CST Practice Test. Multiple Choice Questions
CST Practice Test Young NAME CST Practice Test Multiple Choice Questions 1) At 1 atm and 298 K, which of the K a values listed below represents the strongest acid? 5) Which electron-dot symbol represents
hij GCSE Additional Science Chemistry 2 Foundation Tier Chemistry 2F SPECIMEN MARK SCHEME Version 1.0
hij GCSE Additional Science Chemistry 2 Foundation Tier Chemistry 2F SPECIMEN MARK SCHEME Version.0 Copyright 20 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA)
Chapter 7 Periodic Properties of the Elements
Chapter 7 Periodic Properties of the Elements 1. Elements in the modern version of the periodic table are arranged in order of increasing. (a). oxidation number (b). atomic mass (c). average atomic mass
Chapter 17. How are acids different from bases? Acid Physical properties. Base. Explaining the difference in properties of acids and bases
Chapter 17 Acids and Bases How are acids different from bases? Acid Physical properties Base Physical properties Tastes sour Tastes bitter Feels slippery or slimy Chemical properties Chemical properties
Unit 3 Study Guide: Electron Configuration & The Periodic Table
Name: Teacher s Name: Class: Block: Date: Unit 3 Study Guide: Electron Configuration & The Periodic Table 1. For each of the following elements, state whether the element is radioactive, synthetic or both.
ATOMS AND BONDS. Bonds
ATOMS AND BONDS Atoms of elements are the simplest units of organization in the natural world. Atoms consist of protons (positive charge), neutrons (neutral charge) and electrons (negative charge). The
CHM 1311: General Chemistry 1, Fall 2004 Exam #1, September 8, 2004. Name (print) SSN
CHM 1311: General Chemistry 1, Fall 2004 Exam #1, September 8, 2004 Name (print) SSN Pledge: I have neither given nor received aid on this exam: Signature For ALL problems: SHOW ALL WORK TO GET FULL CREDIT
Chapter 5 Student Reading
Chapter 5 Student Reading THE POLARITY OF THE WATER MOLECULE Wonderful water Water is an amazing substance. We drink it, cook and wash with it, swim and play in it, and use it for lots of other purposes.
Chapter 11. Electrochemistry Oxidation and Reduction Reactions. Oxidation-Reduction Reactions. Oxidation-Reduction Reactions
Oxidation-Reduction Reactions Chapter 11 Electrochemistry Oxidation and Reduction Reactions An oxidation and reduction reaction occurs in both aqueous solutions and in reactions where substances are burned
Unit 2 Periodic Behavior and Ionic Bonding
Unit 2 Periodic Behavior and Ionic Bonding 6.1 Organizing the Elements I. The Periodic Law A. The physical and chemical properties of the elements are periodic functions of their atomic numbers B. Elements
EDEXCEL INTERNATIONAL GCSE CHEMISTRY EDEXCEL CERTIFICATE IN CHEMISTRY ANSWERS SECTION C
EDEXCEL INTERNATIONAL GCSE CHEMISTRY EDEXCEL CERTIFICATE IN CHEMISTRY ANSWERS SECTION C Chapter 16 1. Burn sulfur in air to give sulfur dioxide. S(s) + O 2 (g) ----> SO 2 (g) Pass this with more air over
GCE. Chemistry A. Mark Scheme for June 2011. Advanced Subsidiary GCE Unit F321: Atoms, Bonds and Groups. Oxford Cambridge and RSA Examinations
GCE Chemistry A Advanced Subsidiary GCE Unit F32: Atoms, Bonds and Groups Mark Scheme for June 20 Oxford Cambridge and RSA Examinations OCR (Oxford Cambridge and RSA) is a leading UK awarding body, providing
EXPERIMENT 4 The Periodic Table - Atoms and Elements
EXPERIMENT 4 The Periodic Table - Atoms and Elements INTRODUCTION Primary substances, called elements, build all the materials around you. There are more than 109 different elements known today. The elements
CHAPTER 12: CHEMICAL BONDING
CHAPTER 12: CHEMICAL BONDING Active Learning Questions: 3-9, 11-19, 21-22 End-of-Chapter Problems: 1-36, 41-59, 60(a,b), 61(b,d), 62(a,b), 64-77, 79-89, 92-101, 106-109, 112, 115-119 An American chemist
Composition of nucleus. Priority Vocabulary: Electron, Proton, Neutron, Nucleus, Isotopes, Atomic Number, Atomic Mass, Element, Electron Shell,
Lake County, Lakeview, 9 th grade, Physical Science, Brent Starr Standard: H1P1 Explain how atomic structure is related to the properties of elements and their position in the Periodic Table. Explain how
Balancing Chemical Equations
Balancing Chemical Equations Academic Success Center Science Tutoring Area Science Tutoring Area Law of Conservation of Mass Matter cannot be created nor destroyed Therefore the number of each type of
11-1 Stoichiometry. Represents
11-1 Stoichiometry What is stoichiometry? Calculations that relate the quantities of substances. It is the study of quantitative (measurable amounts) relationships in chemical reactions and equations.