Chemistry

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Across
  1. 1. a chemical with kr as a symbol its colorless and odorless
  2. 6. chemical element
  3. 9. a stable subatomic particle with a negative charge
  4. 10. its a heavy metal denser then most tings
  5. 11. a chemical element and its atomic
  6. 13. an oxide containing two atoms of oxygen in its molecules
  7. 14. pulse and minis
Down
  1. 2. is colorless tasteless and smelless
  2. 3. the unit used to measure energy or work
  3. 4. hard and the body needs it for growth and development
  4. 5. its used to make nitric acid and dyes
  5. 7. its a chemical you use it balloons
  6. 8. what makes up everything
  7. 12. an alkaline earth metal
  8. 15. its like air