Atomic Theory - Klaire Cain

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Across
  1. 4. particle nuclei of helium atoms
  2. 7. quantity of matter an object contains
  3. 8. cloud space where electrons are likely to be found outside of a nucleus
  4. 11. level energies associated with electrons
  5. 12. radiation caused by disintegration of atomic nuclei
  6. 13. substances produced in an experiment
Down
  1. 1. energy proportional in magnitude to the radiation frequency
  2. 2. preservation of a physical quantity
  3. 3. positively charged center of an atom
  4. 4. basic unit of a chemical element
  5. 5. substances that start a chemical reaction
  6. 6. natural science that studies matter energy, and force
  7. 9. subatomic particle with a negative charge
  8. 10. a substance‘s mass per unit of volume
  9. 14. fly or move around in a circle