All About Elements

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Across
  1. 2. abbreviation sounds like a decline
  2. 5. Superman's weakness
  3. 6. silver ore in Minecraft
  4. 9. you need this to breathe
  5. 14. sounds like a language and is in period 4
  6. 15. named after Albert Einstien
  7. 18. has 3 valence electrons and is in group 3
  8. 19. found in pools
  9. 20. named after California
  10. 21. only non-metal in group one
Down
  1. 1. only metalloid in period 2
  2. 3. number of energy level is determined by this
  3. 4. named after Ernest Rutherford
  4. 7. only group with all nonmetals
  5. 8. found in milk
  6. 10. a rare earth element in period 5
  7. 11. found in balloons
  8. 12. was named after Germany
  9. 13. found in bananas
  10. 16. can be found in skincare
  11. 17. elements in this group have 7 valence electrons