1.
3.d A) Sublimation B) Thermal energy C) Temperature D) Heat 2.
3.f A) group B) period C) metal D) nonmetal 3.
3.b A) more electrons than neutrons B) more protons than electrons C) more neutrons than protons D) more electrons than protons 4.
3.b A) one pair B) two pairs C) three pairs D) four pairs 5.
3.f A) three-fourths B) one-third C) two-thirds D) two-fifths 6.
7.b A) mass number B) atomic number C) number of ions D) number of neutrons 7.
7.b A) same mass number B) number of electrons C) same electric charge D) number of protons 8.
7.b A) have the same chemical properties B) have the same mass number C) have the same number of neutrons D) are radioactive 9.
3.b A) removed from both atoms B) shared between the two atoms C) added to both atoms D) transferred from one atom to the other 10.
3.d A) Sublimation occurs at the surface of the liquid. B) Vaporization occurs at the surface of the liquid. C) Evaporation occurs within the liquid D) Vaporization occurs within the liquid. 11.
3.b A) organic compounds B) binary compounds C) salts D) synthetic polymers 12.
3.f A) two B) four C) six D) eight 13.
3.b A) positive ions B) ionic bonds C) covalent bonds D) noble gases 14.
3.f A) in order of increasing mass number B) in order of increasing atomic number C) in order of increasing number of isotopes D) in order of increasing chemical properties 15.
7.b A) It decreases by two. B) It decreases by one. C) It increases by two. D) It increases by one. 16.
3.a A) The electron mass is about 2,000 times greater than the proton mass. B) The proton mass is about the same as the electron mass. C) The proton mass is about 2,000 times greater than the electron mass. D) The proton mass is about 200 times greater than the electron mass. 17.
3.a A) 2 B) 8 C) 6 D) 10 18.
7.b A) 7 neutrons B) 6 neutrons C) 8 neutrons D) 13 neutrons 19.
7.b A) 2 g B) 1 g C) 0.25 g D) 3 g 20.
3.d A) melting B) deposition C) vaporization D) sublimation 21.
7.b A) symbol, wavelengths, chemical properties B) symbol, isotopes, ions C) name, physical properties, chemical properties D) name, symbol, atomic number 22.
3.f A) chemical properties B) atomic numbers C) mass numbers D) radioactive properties 23.
7.c A) larger atoms or molecules B) weaker attractive forces between atoms or molecules C) stronger attractive forces between atoms or molecules D) smaller atoms or molecules 24.
7.c A) atoms are close together in metals B) metals contain electrons that are free to move C) atoms have more mass in metals D) metals are solids 25.
3.e A) Usually push particles away from each other. B) Become weaker as the particles get closer together. C) Become repulsive as particles get farther apart. D) Become stronger as the particles get closer together. 26.
7.a A) 17 and 18 B) 16 and 17 C) 3 through 12 D) 1 and 2 27.
7.a A) halogens B) actinides C) lanthanides D) noble gases 28.
3.d A) boiling and melting B) evaporation and sublimation C) evaporation and boiling D) sublimation and boiling 29.
3.e A) sublimation B) evaporation C) an increase in pressure D) condensation 30.
3.d A) The thermal energy of the substance increases. B) The temperature of the substance increases. C) The thermal energy of the substance doesn't change. D) The potential energy of the particles in the substance decreases. 31.
7.f A) ions B) metals C) monomers D) noble gases 32.
3.d A) condensation B) evaporation C) sublimation D) vaporization 33.
3.a A) Light with all wavelengths is given off. B) Light with a single wavelength is given off. C) Light with a single wavelength is absorbed. D) Light with all wavelengths is absorbed. 34.
3.d A) liquid changes to a gas B) gas changes to a liquid C) solid changes to a gas D) gas changes to a solid 35.
7.b A) the number of protons in the nucleus B) the number of neutrons in the nucleus C) the number of protons and neutrons in the nucleus D) the number of atoms in the nucleus 36.
3.c A) ion B) binary compound C) unit cell D) monomer 37.
3.a A) The number of protons equals the number of neutrons. B) The number of protons equals the number of electrons. C) The number of neutrons equals the number of electrons. D) The number of protons and neutrons equals the number of electrons. 38.
7.b A) A nucleus emits an alpha particle. B) A nucleus emits a proton. C) A nucleus emits an electron. D) A nucleus emits a neutron. 39.
7.a A) halogen B) metal C) nonmetal D) semimetal 40.
3.a A) Positive charge is spread out evenly through the atom. B) The nucleus of an atom is much smaller than the atom. C) Most of the space in an atom is taken up by the nucleus. D) Thomson's atomic model was correct. 41.
3.e A) Particles in the solid are much farther apart. B) Particles in the liquid are much farther apart. C) The spacing between particles changes by only a small amount. D) The spacing between particles doesn't change. 42.
7.c A) on the left side and in the center B) on the left side C) in the center D) on the right side 43.
3.e A) The shape and the volume can change. B) The shape and the volume don't change. C) The shape doesn't change, but the volume can change. D) The volume is constant, but the shape can change. 44.
3.c A) It has a cubic structure. B) It is a metallic crystal. C) It is a molecular crystal. D) It has a hexagonal structure. 45.
3.a A) They are mixed together with protons and neutrons. B) They move in circular orbits that can be any diameter. C) They move in circular orbits that can have only certain diameters. D) They can be anywhere in the electron cloud. 46.
3.e A) Particles are far apart, but are held in place by strong forces. B) Particles vibrate back and forth but can move from one place to another. C) Particles are far apart and move independently. D) Particles vibrate back and forth without moving from place to place. 47.
3.d A) They move only if the object is moving. B) They can move in all directions but have the same speed. C) They move in the direction of the gravitational force and have different speeds. D) They can move in all directions and have different speeds. 48.
3.f A) all elements with the same colored block B) a horizontal row of elements C) a vertical column of elements D) all elements with the same icon 49.
3.e A) The temperature of the material can increase or decrease. B) The temperature of the material doesn't change. C) The thermal energy of the material doesn't change. D) The forces between the particles in the material increase. 50.
5.d A) dissolving B) boiling C) burning D) freezing 51.
7.c A) ductility B) good conductor of electricity C) high melting point D) poor conductor of heat 52.
3.b A) solid at room temperature B) brittle C) dissolve in water D) low melting point 53.
3.a A) -1 B) 0 C) +1 D) +2 54.
5.d A) It is irreversible. B) It is reversible. C) It is a chemical change. D) It occurs during radioactive decay. 55.
7.b A) The total number of protons and neutrons in the nucleus is the same. B) They have the same number of neutrons in the nucleus. C) They have the same number of protons in the nucleus. D) They have the same mass number. 56.
3.e A) Attractive forces are so weak that particles move independently. B) Particles vibrate back and forth ,but don't move from place to place. C) Particles can slide past each other and move from one place to another. D) Attractive forces between particles are strong enough to keep particles close together. 57.
7.b A) a nucleus with 6 protons and 10 neutrons B) a nucleus with 10 protons and 8 neutrons C) a nucleus with 8 protons and 10 neutrons D) a nucleus with 10 protons and 6 neutrons 58.
3.b A) solution is a good conductor of electricity B) can be solid, liquid or gas at room temperature C) higher melting point than ionic compounds D) only solid at room temperature 59.
7.c A) metals B) liquids C) solids D) gases 60.
7.c A) Electrons are transferred from one atom to another. B) Metals are covalent compounds. C) Metals are ionic compounds. D) Electrons in metals move freely.
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