Chem I Final Review Worksheet Name Hour Chem 1Review
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1 Name Hour Chem 1Review 1. Write the number of protons for each of the metalloids in their boxes. 2. Color the metals blue. 3. Color the non-metals yellow. 4. Label the groups with their numbers. 5. Label the periods. 6. An atom that gains one or more electrons is called a(n). This atom would have a charge. 7. An atom that loses one or more electrons is called a(n). This atom would have a charge. 8. Write the shorthand electon configuration for Potassium. 9. How many valence electrons does Potassium have? 10. List the symbols for three other elements that have the same number of valence electrons as Potassium. What group are they in? 11. If the potassium atom were to ionize it would lose electron(s) from the orbital. Then the potassium ion would have the same electron configuration as, which is a. 12. Draw the Lewis electron dot notation for a potassium atom. 13. Write the shorthand electron configuration for Bromine. 14. How many valance electrons does Bromine have? 15. List the symbols for three other elements that have the same number of valence electrons as Bromine. What group are they in? 16. If the Bromine atom were to ionize it would gain electron(s) in the orbital. Then the bromine ion has the same electron configuraton as, which is a. 17. Draw the Lewis electon dot notation for a Bromine atom. 18. What is the formula for potassium bromide?
2 26. Chem I Final Review Worksheet 19. what type of bond occurs between the potassium and the bromine? 20. Do the potassium and bromine share an electron? (Y/N) 21. When an atom absorbs in the form of heat or electricity, the in the atom are excited to a energy level. When they return to their state, they release. 22. Write the symbols/formulas for the following substances. Circle the items that are compounds. a Hydrochloric acid b Phosphorous c Fluoride ion d Copper(II) ion e Sodium oxalate 25. Given 2 formula units of H3PO4 2(H3PO4) a f g h i j How many hydrogen atoms are present? b How many phosphorous atoms are present? c How many oxygen atoms are present? d What is the name of this compound? Atomic # Mass # # of protons # of neutrons # of electrons Iron(III)hydroxide Hydrogen gas Nitrate ion Dinitrogen dioxide Tin (II) phosphate Complete Chemical Symbol Give the numbers of protons, electrons, and neutrons in the atoms of each of the following isotopes. 27. barium 137 p + e - n 28. xenon-131 p + e - n 29. The circles below represent atoms of certain elements. For each kind of element place the correct number of electrons, protons, and neutrons in the appropriate area of the atom. Beryllium-9 Nitrogen-14
3 30. What is the mass (g) of each of the following samples? a. 5 moles Zn b moles H2SO4 c. 3.5 moles Mg(NO3)2 31. What is the percent composition of oxygen in H2SO4? 32. What is the percent composition of oxygen in Mg(NO3)2? 33. How many moles are in each of the following samples? a. 0.4 grams Pb b x atoms Au c. 316 grams calcium hydroxide 34. Write the atomic number, electron configurations, orbital notations, and electron dot notations for the following elements. For the (*) elements, use the shorthand electron configuration method. Atom N Atomic # Electron configurations Orbital notations Electron Dot *Br
4 35.. For the two elements given, fill in the following table. Element Oxygen Calcium # of Valence electrons - Write the shorthand Electron Configuration 36. Directions: For the following chemical formulas or chemical names, identify it as molecular and ionic, and write the chemical name. Formula Molecular/Ionic Cation Anion If ionic Name LiBr CCl 4 P 6 O 5 Cu(NO 3 ) 2 CaO KBr N 2 O 3 CO 2 NH 4 Cl 37. Ion Mono- or Polyatomic Cation or anion Name Br - Ca 2+ ClO 3 1- Pb A compound is analyzed and the empirical formula is found to be CH 3 O. The molar mass of the molecular formula is 62 grams. Based on this information, what is the molecular formula for this compound?
5 39. Determine the molar mass of the following compound. Then determine the % composition of each element in the compound. Zn 3 (PO 4 ) 2 Molar mass = % of zinc = % of phosphorus = % of oxygen = 40. What is the empirical formula for a compound found to contain 22.9% sodium, 21.5% boron, 55.7% oxygen? Write balanced chemical equations and identify the type of reaction 41. Mg + O2 MgO 42. HgO Hg + O Zn + Cu(NO 3 ) 2 Cu + Zn(NO 3 ) Silver nitrate + copper (II) 45. Zinc Chloride + ammonium sulfide 46. Sodium chlorate
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