periodic table crossword

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Across
  1. 2. what you breath in
  2. 4. has 15 protons
  3. 7. used in pools
  4. 10. strange voice
  5. 12. named after a famous German scientist
  6. 13. used for building bones
  7. 14. planet starts with m
Down
  1. 1. first letter of Hello is the chemical symbol
  2. 3. The continent we live in
  3. 4. banana
  4. 5. has 16 protons
  5. 6. can be used as a foil
  6. 8. chemical symbol: Be
  7. 9. chemical symbol: Na
  8. 11. used for bright signs