Atomic Theory and Atomic Structure

Edit Answers
12345678910111213141516171819
Across
  1. 3. A unit or quantum of light
  2. 4. Charge: 0
  3. 6. Charge: -1
  4. 7. Was Thompson's theory negatively or positively charged?
  5. 10. _________ are attracted to negative electrons by electrical force (2 words)
  6. 12. Number of electrons in energy level 4 (two words)
  7. 14. Greek philosper
  8. 16. Date: 1897
  9. 17. English school teacher
  10. 19. Each element has a unique number of protons
Down
  1. 1. Charge: +1
  2. 2. Rutherford's discovery
  3. 5. unstable isotopes that emit radiation and decay into another isotope
  4. 6. holds the atom together (two words)
  5. 8. different numbers of neutrons
  6. 9. The number of protons in the nucleus of an atom (two words)
  7. 11. Theory: mass of an atom in the center
  8. 13. Number of electrons in energy level 1
  9. 15. ______ atoms have no overall charge because the number of protons and electrons is the same
  10. 18. unable to be cut or divided