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64 Matching questions

  1. photons
  2. antiparticles
  3. orbital
  4. mass defect
  5. element
  6. heavy atoms
  7. subatomic particles
  8. baryons
  9. mixture
  10. alpha particle
  11. neutron
  12. electron capture
  13. m = E / c^2
  14. density = mass / volume
  15. specific gravity = density of sample / density of standard
  16. density
  17. solid
  18. weight
  19. atom
  20. heterogeneous mixture
  21. gas
  22. valence electrons
  23. neutrino
  24. periods
  25. atomic mass unit
  26. mass
  27. mass number
  28. compound
  29. nucleus
  30. specific gravity
  31. molecule
  32. protons
  33. positron
  34. E = mc^2
  35. ion
  36. groups
  37. antimatter
  38. gamma radiation
  39. mesons
  40. hadron
  41. gluon
  42. homogeneous mixture
  43. isotopes
  44. quarks
  45. alpha decay
  46. half-life
  47. elementary particles
  48. liquid
  49. leptons
  50. plasma
  51. elemental molecule
  52. annihilation
  53. electrons
  54. anion
  55. electromagnetic radiation
  56. radioactive decay
  57. pair production
  58. beta decay
  59. atomic number
  60. cation
  61. pure substance
  62. atomic mass
  63. inertia
  64. matter
  1. a a negatively charged ion with more electrons than protons
  2. b state of matter with a definite shape and volume that consists of low-energy particles packed closely together
  3. c formula for specific gravity
  4. d term for atoms with a neutron to proton ratio greater than 1:1
  5. e term for any substance that cannot be broken down by chemical means into a simpler substance
  6. f When a photon of ____ _______ passes through a heavy material, such as lead, the photon suddenly vanishes and a pair of oppositely charged particles appear.
  7. g the sum of the number of protons and neutrons in the nucleus
  8. h term for particles like the positron, the antiproton, and the antineutron
  9. i the ratio of an object's mass to its volume
  10. j a high-energy particle of two protons and two neutrons; a reactive helium cation
  11. k name for the vertical rows of elements on the Periodic Table
  12. l term for particles that have no components, no building blocks, and no smaller parts
  13. m a molecule in which the atoms are of different elements
  14. n term for any substance believed to contain quarks
  15. o a chemical combination of two or more atoms
  16. p the 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
  17. q process in which a nucleus emits a high-energy particle of two protons and two neutrons, causing a low amount of radiation
  18. r formula for density
  19. s term for hadrons that contain three quarks
  20. t negatively charged particles that move about the nucleus
  21. u term for hadrons that contain two quarks
  22. v the smaller particles that make up protons and neutrons
  23. w the largest atomic particle that has a neutral charge
  24. x name for the horizontal rows of elements on the Periodic Table
  25. y term for a region of high likelihood for finding an electron as it travels around the nucleus
  26. z a substance containing only one kind of atom or molecule
  27. aa term that represents the amount of force the earth's gravity exerts on an object's mass
  28. ab state of matter that has a definite volume but not a definite shape
  29. ac positively charged particles in an atom that give the atom its identity as an element
  30. ad term for a mixture in which the particles of each substance are uniformly distributed
  31. ae occurs when a positron and electron collide and convert their combined masses into a form of energy, either a low-energy photon or gamma radiation
  32. af term for an atom whose charge is changed due to the loss or gain of electrons
  33. ag state of matter that is a highly ionized gas and can only exist at very high temperatures
  34. ah term for particles that are smaller than an atom
  35. ai a positively charged ion with more protons than electrons
  36. aj term for the time required for half a radioactive substance's mass to decay into something else
  37. ak term for atoms with the same atomic number but different mass numbers because of different numbers of neutrons
  38. al tiny particle that is the basic building block of all matter
  39. am term for particles such as electrons that do not contain any quarks
  40. an a molecule in which all the elements are the same
  41. ao collection of protons and neutrons in the center of an atom
  42. ap term for any type of emitted energy
  43. aq unit that is one-twelfth the mass of a carbon-12 atom
  44. ar anything that has mass and takes up space
  45. as particle of matter that has virtually no mass and travels at the speed of light
  46. at term for a mixture that settles into layers of different particles or has large clumps of molecules
  47. au the process in which the quarks of an atom's protons and neutrons shift and release energy
  48. av state of matter with high-enery particles that will spread to fill its container
  49. aw formula for energy
  50. ax process that occurs when a neutron's down quark changes into an up quark, changing the neutron into a proton and forcing the emission of a high-energy electron
  51. ay the massless particle that binds quarks together
  52. az electrons in the outermost electron layer
  53. ba term that represents how much inertia an object has, or how much force is required to change the object's state of motion
  54. bb term for the general mass of an element, found by weighted average
  55. bc process in which an orbiting electron is absorbed by a proton as it travels close to the nucleus
  56. bd term for the ratio of a given sample's density to a standard density
  57. be tiny particles of light
  58. bf the difference between the expected mass of a nucleus and the actual mass, caused by strong nuclear force
  59. bg The number of protons in a given element is called the ____ ____.
  60. bh term for a positively charged electron
  61. bi term for the electron and positron that denotes the fact that they have the same characteristics, but opposite charges
  62. bj formula for mass
  63. bk matter's unique property of resisting any change in its present state of motion
  64. bl a physical combination of two or more elements or compounds that can be easily separated