Unit 2

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Across
  1. 2. The number of protons in the nucleus of an atom
  2. 3. horizontal row that corresponds to the number of energy levels.
  3. 4. a wave's height from zero to crest
  4. 8. who proposed the quantum mechanical model
  5. 9. average mass of an atom in a naturally occurring sample
  6. 11. the way electrons are arranged in orbitals.
  7. 12. who proposed that atoms were indestructible and indivisible
  8. 13. who used the scientific method to revise Democritus's model
  9. 15. who stated that electrons could be found in specific circular paths orbiting the nucleus
Down
  1. 1. who discovered the nucleus of an atom
  2. 5. who created the plum pudding model
  3. 6. who determined the charge and mass of the electron
  4. 7. what is the charge of an atom
  5. 10. who discovered the neutron
  6. 14. The smallest particle of an element