Atomic Theory

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Across
  1. 2. an atom with lost or gained electrons
  2. 4. same element, different mass
  3. 8. the scientist who invented the "Billiard Ball Mode"
  4. 9. Subatomic particle with a neutral charge
  5. 10. subatomic particle with a positive charge
  6. 12. means atom in greek
  7. 15. atom or molecule that gained or lost an electron
  8. 16. a positively charged ion
  9. 17. The scientist that discredited Leucippus and Democritus
  10. 19. chemist that discovered the orbital model
  11. 20. a mathematical expression to find the wave function
Down
  1. 1. who discovered the electron
  2. 3. substance that cannot be broken down into a smaller substance
  3. 5. Subatomic particle with a negative charge
  4. 6. the sum of protons and neutrons on the periodic table
  5. 7. rejected the idea of only four elements
  6. 11. electrons at the out edge of the shell
  7. 13. a chemical bond of two elements
  8. 14. type of model that includes element symbol as the nucleus
  9. 18. drop experiment to find charge and mass of the electron