Periodic Table Groups

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Across
  1. 2. Group 15 elements
  2. 4. Forms +3 cations
  3. 5. Forms allotropes like diamond and graphite
  4. 8. most reactive metals, has one valence electron\
  5. 9. Columns of the periodic table
  6. 11. Most reactive nonmetals
Down
  1. 1. Forms -2 anions
  2. 3. The properties of elements repeat periodically
  3. 6. Beryllium, Magnesium, Calcium..
  4. 7. Rows on the periodic Table
  5. 10. Inert elements with a filled outer shell of electrons