Atomic Theory and Atomic Structure

Edit Answers
1234567891011121314151617181920
Across
  1. 4. English school teacher
  2. 5. The number of protons in the nucleus of an atom (two words)
  3. 7. unable to be cut or divided
  4. 8. Theory: mass of an atom in the center
  5. 9. Rutherford's discovery
  6. 10. Charge: 0
  7. 11. Number of electrons in energy level 4 (two words)
  8. 16. _________ are attracted to negative electrons by electrical force (2 words)
  9. 19. ______ atoms have no overall charge because the number of protons and electrons is the same
  10. 20. A unit or quantum of light
Down
  1. 1. Charge: +1
  2. 2. Was Thompson's theory negatively or positively charged?
  3. 3. Date: 1897
  4. 6. holds the atom together (two words)
  5. 12. Number of electrons in energy level 1
  6. 13. unstable isotopes that emit radiation and decay into another isotope
  7. 14. Each element has a unique number of protons
  8. 15. Greek philosper
  9. 17. different numbers of neutrons
  10. 18. Charge: -1