Atomic Theory

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Across
  1. 2. Particle attracted to a positive charge.
  2. 3. First cohesive modern atomic theory.
  3. 4. Particle that has mass and charge.
  4. 6. Particle with mass but no charge.
  5. 8. Isotopes have the same number of ___.
  6. 10. Number of protons in gallium.
  7. 12. The A# refers to the _______ of the atom.
  8. 13. Particle with negative charge.
  9. 14. Isotopes differ in their number of ___.
  10. 15. Particle attracted to a negative plate.
  11. 16. Experiment: atom is mostly empty space.
Down
  1. 1. First idea of atoms.
  2. 5. The Z# refers to the _____ of the atom.
  3. 6. Particle not affected by another charge.
  4. 7. Fluorine-19 contains __ neutrons.
  5. 9. His model include a nucleus.
  6. 11. Potassium-31 contains ______ neutrons.
  7. 17. Experiment: Atom has subatomic particles.