Periodic Table

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Across
  1. 2. The first word in Tony Starks superhero name
  2. 3. bones and teeth
  3. 5. most reactive element
  4. 6. form of matter that has no fixed shape or volume
  5. 8. a negatively charged particle
  6. 11. what paper clips are made from
  7. 13. What pennies are made from
  8. 15. is the lightest element
  9. 17. 0 charged particle
  10. 18. center of an atom
Down
  1. 1. Salt
  2. 3. a substance that can be used in chemistry
  3. 4. The "opposite" of gold
  4. 7. smallest component of an element
  5. 9. What you breathe in
  6. 10. refers to the periodic table
  7. 12. a thing on the periodic table
  8. 13. what you breathe out
  9. 14. positively charged particle
  10. 16. What the world cup trophy is made of