Periodic Table

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Across
  1. 3. symbolized by Ar
  2. 8. lightest alkali metal
  3. 10. gas which causes rusting
  4. 11. metalloid often used in solar panels
  5. 13. the smallest halogen
  6. 14. element 4
Down
  1. 1. lightest Noble gas
  2. 2. alkaline earth metal found in milk
  3. 4. element that makes you rich until you grow old
  4. 5. most of the atmosphere is made of this
  5. 6. element named after the city Mr. Su went to college
  6. 7. The most abundant element in the universe
  7. 9. element next door to Pleasanton
  8. 12. has four valence electrons and makes up organic molecules