Atoms and Elements

12345678910111213141516171819
Across
  1. 3. Subatomic particle with no charge.
  2. 4. An element with a varying number of electrons.
  3. 6. Number of protons + Number of neutrons = __________ (no spaces)
  4. 9. The smallest particles of an element that still have the element's properties.
  5. 12. Electrons on the outermost shell (enter the first word).
  6. 13. Element with the electron configuration of 1s2 2s2 2p5.
  7. 14. Used to organize all of the known elements (no spaces).
  8. 16. An element with a varying number of neutrons.
  9. 17. Certain elements in groups 13-16 (plural).
  10. 18. A row on the periodic table.
  11. 19. Subatomic particle with a positive charge.
Down
  1. 1. Element with electron configuration of 1s2 2s1.
  2. 2. Element with electron configuration of [Rn] 5f3 6d1 7s2
  3. 5. Element with electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d8.
  4. 6. The number of protons in an element (no spaces).
  5. 7. Element with electron configuration of [Kr] 5s2 4d9.
  6. 8. Elements in group 18, are the most stable (plural).
  7. 10. Elements in group 1 (plural).
  8. 11. Subatomic particle with a negative charge.
  9. 15. A column on the periodic table.