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64 True/False questions

  1. aniona negatively charged ion with more electrons than protons

          

  2. elementterm that represents the amount of force the earth's gravity exerts on an object's mass

          

  3. pure substancea substance containing only one kind of atom or molecule

          

  4. densitythe ratio of an object's mass to its volume

          

  5. annihilationa negatively charged ion with more electrons than protons

          

  6. antimatteranything that has mass and takes up space

          

  7. baryonsa negatively charged ion with more electrons than protons

          

  8. mesonsterm that represents how much inertia an object has, or how much force is required to change the object's state of motion

          

  9. positronterm for a positively charged electron

          

  10. protonspositively charged particles in an atom that give the atom its identity as an element

          

  11. half-lifeterm for any substance believed to contain quarks

          

  12. beta decayformula for energy

          

  13. electromagnetic radiationterm for any type of emitted energy

          

  14. quarksstate of matter with high-enery particles that will spread to fill its container

          

  15. gamma radiationWhen a photon of ____ _______ passes through a heavy material, such as lead, the photon suddenly vanishes and a pair of oppositely charged particles appear.

          

  16. E = mc^2formula for energy

          

  17. gluonthe massless particle that binds quarks together

          

  18. weightthe ratio of an object's mass to its volume

          

  19. antiparticlesa high-energy particle of two protons and two neutrons; a reactive helium cation

          

  20. radioactive decayprocess in which a nucleus emits a high-energy particle of two protons and two neutrons, causing a low amount of radiation

          

  21. subatomic particlesterm for particles that are smaller than an atom

          

  22. moleculea chemical combination of two or more atoms

          

  23. photonstiny particles of light

          

  24. heavy atomstiny particle that is the basic building block of all matter

          

  25. mass defectthe sum of the number of protons and neutrons in the nucleus

          

  26. cationa positively charged ion with more protons than electrons

          

  27. leptonsterm for particles such as electrons that do not contain any quarks

          

  28. electron capturethe largest atomic particle that has a neutral charge

          

  29. periodsname for the horizontal rows of elements on the Periodic Table

          

  30. gasstate of matter with high-enery particles that will spread to fill its container

          

  31. valence electronsthe largest atomic particle that has a neutral charge

          

  32. neutrinothe largest atomic particle that has a neutral charge

          

  33. density = mass / volumeunit that is one-twelfth the mass of a carbon-12 atom

          

  34. m = E / c^2formula for mass

          

  35. inertiaparticle of matter that has virtually no mass and travels at the speed of light

          

  36. electronsnegatively charged particles that move about the nucleus

          

  37. massterm for hadrons that contain two quarks

          

  38. pair productionthe process in which a photon of gamma radiation passes through a heavy material, such as lead; the photon suddenly vanishes; and a pair of oppositely charged particles appear

          

  39. mixturestate of matter that has a definite volume but not a definite shape

          

  40. orbitalstate of matter with a definite shape and volume that consists of low-energy particles packed closely together

          

  41. compounda molecule in which the atoms are of different elements

          

  42. specific gravity = density of sample / density of standardformula for specific gravity

          

  43. homogeneous mixtureterm for a mixture in which the particles of each substance are uniformly distributed

          

  44. plasmastate of matter with high-enery particles that will spread to fill its container

          

  45. atomic mass unitunit that is one-twelfth the mass of a carbon-12 atom

          

  46. alpha decayprocess in which a nucleus emits a high-energy particle of two protons and two neutrons, causing a low amount of radiation

          

  47. specific gravityterm for the ratio of a given sample's density to a standard density

          

  48. atoma positively charged ion with more protons than electrons

          

  49. groupsname for the vertical rows of elements on the Periodic Table

          

  50. iona negatively charged ion with more electrons than protons

          

  51. nucleusthe smaller particles that make up protons and neutrons

          

  52. atomic numberterm for the general mass of an element, found by weighted average

          

  53. elementary particlesterm for particles that have no components, no building blocks, and no smaller parts

          

  54. atomic massterm for the general mass of an element, found by weighted average

          

  55. liquidstate of matter that has a definite volume but not a definite shape

          

  56. alpha particleterm for the electron and positron that denotes the fact that they have the same characteristics, but opposite charges

          

  57. solidstate of matter that has a definite volume but not a definite shape

          

  58. elemental moleculea chemical combination of two or more atoms

          

  59. isotopespositively charged particles in an atom that give the atom its identity as an element

          

  60. hadrona positively charged ion with more protons than electrons

          

  61. mass numberthe difference between the expected mass of a nucleus and the actual mass, caused by strong nuclear force

          

  62. heterogeneous mixtureterm for a mixture that settles into layers of different particles or has large clumps of molecules

          

  63. mattertiny particle that is the basic building block of all matter

          

  64. neutronparticle of matter that has virtually no mass and travels at the speed of light