TEST(MAKE UP) 1/23/17 NAME ROW PD

Transcription

1 1/23/17 NAME ROW PD 1) Which electron configuration represents the electrons in an atom of Ga in an excited state? A) B) C) D) ) The total mass of the protons in an atom of gold-198 is approximately A) 79 atomic mass units B) 119 atomic mass units C) 198 atomic mass units D) 277 atomic mass units 3) The atomic mass of titanium is atomic mass units. This atomic mass represents the A) total mass of all the protons and neutrons in an atom of Ti B) total mass of all the protons, neutrons, and electrons in an atom of Ti C) weighted average mass of the most abundant isotope of Ti D) weighted average mass of all the naturally occurring isotopes of Ti 4) Which atom in the ground state has an outermost electron with the most energy? A) Cs B) K C) Li D) Na 5) When an excited electron in an atom moves to the ground state, the electron A) absorbs energy as it moves to a higher B) absorbs energy as it moves to a lower C) emits energy as it moves to a higher D) emits energy as it moves to a lower energy state 6) What must occur when an electron in an atom returns from a higher to a lower? A) A specific amount of energy is released. B) A random amount of energy is released. C) The atom undergoes transmutation. D) The atom spontaneously decays. 7) Which statement correctly describes the charge of the nucleus and the charge of the electron cloud of an atom? A) The nucleus is positive and the electron cloud is positive. B) The nucleus is positive and the electron cloud is negative. C) The nucleus is negative and the electron cloud is positive. D) The nucleus is negative and the electron cloud is negative. 8) The valence electrons in an atom of phosphorous in the ground state are all found in A) the first shell B) the second shell C) the third shell D) the fourth shell 9) The elements in Period 4 on the Periodic Table are arranged in order of increasing A) atomic radius B) atomic number C) number of valence electrons D) number of occupied shells of electrons 10) Which list of elements contains a metal, a metalloid, a nonmetal, and a noble gas? A) Be, Si, Cl, Kr B) C, N, Ne, Ar C) K, Fe, B, F D) Na, Zn, As, Sb 11) Which element has chemical properties that are most similar to those of calcium? A) Co B) K C) N D) Sr 12) Which elements have the most similar chemical properties? A) boron and carbon B) oxygen and sulfur C) aluminum and bromine D) argon and silicon 13) An atom in the ground state has a stable valence electron configuration. This atom could be an atom of A) Al B) Cl C) Na D) Ne 14) Which particle has the least mass? A) B) C) 1 0n D) 0-1e

2 15) Five cubes of iron are tested in a laboratory. The tests and the results are shown in the table below. Which tests demonstrate chemical properties? A) 1, 3, and 4 B) 1, 3, and 5 C) 2 and 4 D) 2 and 5 16) Which isotopic notation identifies a metalloid that is matched with the corresponding number of protons in each of its atoms? A) 24 Mg and 12 protons B) 28 Si and 14 protons C) 75 As and 75 protons D) 80 Br and 80 protons 17) Which element is malleable and a good conductor of electricity at STP? A) argon B) carbon C) iodine D) silver 18) The graph below shows the volume and the mass of four different substances at STP. Which of the four substances has the lowest density? A) A B) B C) C D) D 19) Which Lewis electron-dot diagram represents calcium oxide? A) B) C) D) 20) The number of valence electrons in each atom of an element affects the element's A) chemical properties B) number of isotopes C) decay mode D) half-life 21) Which atom attains a stable valence electron configuration by bonding with another atom? A) neon B) radon C) helium D) hydrogen 22) An aqueous solution of XCl2 contains colored ions. Element X could be A) Ba B) Ca C) Ni D) Bi 23) What is the net charge on an ion that has 9 protons, 11 neutrons, and 10 electrons? A) 1+ B) 2+ C) 1- D) 2-24) Which element has atoms with the strongest attraction for electrons in a chemical bond? A) chlorine B) nitrogen C) fluorine D) oxygen

3 25) As the elements is Period 3 are considered in order of increasing atomic number, there is a general decrease in A) atomic mass B) atomic radius C) electronegativity D) first ionization energy 26) In Period 3, from left to right in order, each successive element will A) decrease in electronegativity B) decrease in atomic mass C) increase in number of protons D) increase in metallic character 27) Which statement explains why water is classified as a compound? A) Water can be broken down by chemical means. B) Water is a liquid at room temperature. C) Water has a heat of fusion of 334 J/g. D) Water is a poor conductor of electricity. 28) A mL sample of helium gas is in a cylinder with a movable piston at 105 kpa and 275 K. The piston is pushed in until the sample has a volume of 95.0 ml. The new temperature of the gas is 310. K. What is the new pressure of the sample? A) 51.1 kpa B) 216 kpa C) 243 kpa D) 274 kpa 29) At which temperature is the vapor pressure of ethanol equal to the vapor pressure of propanone at 35 C? A) 35 C B) 60. C C) 82 C D) 95 C 30) Which physical changes are endothermic? A) melting and freezing B) melting and evaporating C) condensation and sublimation D) condensation and deposition 31) Which equation represents sublimation? A) I2(s) I2(g) B) I2(s) I2( ) C) I2( ) I2(g) D) I2( ) I2(s) 32) The graph below represents the relationship between pressure and volume of a given mass of a gas at constant temperature. The product of pressure and volume is constant. According to the graph, what is the product in atmml? A) 20. B) 40. C) 60. D) ) Given the diagram representing a heating curve for a substance: During which time interval is the average kinetic energy of the particles of the substance constant while the potential energy of the particles increases? A) AC B) BC C) CD D) DF 34) How many Joules of heat energy are released when 50. grams of water are cooled from 70.ºC to 60.ºC? A) 42 J B) 210 J C) 2100 J D) 4200 J

4 35) The temperature of a sample of water changes from 10 C to 20 C when the sample absorbs 418 joules of heat. What is the mass of the sample? A) 1 g B) 10 g C) 100 g D) 1000 g 36) Two grams of potassium chloride are completely dissolved in a sample of water in a beaker. This solution is classified as A) an element B) a compound C) a homogeneous mixture D) a heterogeneous mixture 37) Which particle diagram represents a mixture of an element and a compound? A) B) C) D) 38) Which elements have the most similar chemical properties? A) Si, As, and Te B) N2, O2, and F2 C) Mg, Sr, and Ba D) Ca, Cs, and Cu 39) Which statement explains why neon is a Group 18 element? A) Neon is a gas at STP. B) Neon has a low melting point. C) Neon atoms have a stable valence electron configuration. D) Neon atoms have two electrons in the first shell. 40) A sample of hydrogen gas will behave most like an ideal gas under the conditions of A) low pressure and low temperature B) low pressure and high temperature C) high pressure and low temperature D) high pressure and high temperature 41) Which process represents a chemical change? A) melting of ice B) corrosion of copper (RUST) C) evaporation of water D) crystallization of sugar 42) Which statement describes a chemical property of silicon? A) Silicon has a blue-gray color. B) Silicon is a brittle solid at 20. C. C) Silicon melts at 1414 C. D) Silicon reacts with fluorine. 43) Petroleum can be separated by distillation because the hydrocarbons in petroleum are A) elements with identical boiling points B) elements with different boiling points C) compounds with identical boiling points D) compounds with different boiling point 44) Which element has the lowest electronegativity value? A) F B) Fr C) Cl D) Cr

5 45) Given the balanced particle-diagram equation: TEST(MAKE UP) Which statement describes the type of change and the chemical properties of the product and reactants? A) The equation represents a physical change, with the product and reactants having different chemical properties. B) The equation represents a physical change, with the product and reactants having identical chemical properties. C) The equation represents a chemical change, with the product and reactants having different chemical properties. D) The equation represents a chemical change, with the product and reactants having identical chemical properties. 46) Given the balanced equation representing a reaction: Which statement describes the changes in energy and bonding for the reactant? A) Energy is absorbed as bonds in H2O are formed. B) Energy is absorbed as bonds in H2O are broken. C) Energy is released as bonds in H2O are formed. D) Energy is released as bonds in H2O are broken. 47) Which type of bond is found in sodium bromide? A) covalent B) hydrogen C) ionic D) metallic 48) Which type of bond is found between atoms of solid cobalt? A) nonpolar covalent B) polar covalent C) metallic D) ionic 49) A sample of a substance has these characteristics: melting point of 984 K hard, brittle solid at room temperature poor conductor of heat and electricity as a solid good conductor of electricity as a liquid on in an aqueous solution This sample is classified as A) a metallic element B) a radioactive element C) a molecular compound D) an ionic compound 50) Which type of bonding is present in a sample of an element that is malleable? A) ionic B) metallic C) nonpolar covalent D) polar covalent