Periodic Table Review

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Across
  1. 3. columns on the table
  2. 6. upper left corner in an element
  3. 7. group 17
  4. 9. The staircase down the periodic table
  5. 11. Elements in the same group have same
  6. 12. a negatively charged ion
  7. 15. The period number that's elements' shells full with 2 valence electrons
  8. 17. d-block
  9. 19. The most reactive metal
  10. 20. the section below the periodic table
Down
  1. 1. The densest element
  2. 2. The most reactive nonmetal
  3. 4. decreases as you go down a group
  4. 5. the only liquid nonmetal element(at stp)
  5. 8. the ability to attract electrons
  6. 9. Metallic bonds are formed by these types of elements
  7. 10. period 18
  8. 13. the size of an ion (increases down a group)
  9. 14. groups on the table
  10. 16. The only liquid metal
  11. 18. group 1