Periodic Table Crossword

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Across
  1. 3. air you use to blow up a balloon
  2. 6. the air
  3. 9. Lightest halogen
  4. 10. ------- peroxide
Down
  1. 1. Glow sticks
  2. 2. ---- bars
  3. 4. A alkali metal
  4. 5. pool water
  5. 7. what you use to eat
  6. 8. smallest unit of an element