Element riddles, Changes and Mixtures!

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Across
  1. 2. Something simple
  2. 8. There are two of me in one water molecule
  3. 10. change A change which forms one or more new subtances
  4. 11. I am in your kitchen pantry, waiting to wrap up some leftovers
  5. 12. Makes your voice funny
  6. 13. Without me, you’d die because you wouldn’t be able to breath!
  7. 14. The smallest person in a group
Down
  1. 1. I am bigger than a dime, but worth less
  2. 3. Two or more different subtances that are not joined.
  3. 4. I am found in jewelry, but am not as expensive as other metals
  4. 5. When I am combined with 2 oxygen atoms, plants use me to engage in photosynthesis
  5. 6. change A change where no new subtances are formed.
  6. 7. You put me in your swimming pool to keep it clean
  7. 9. In the Olympics, I am the metal you want to win 1st
  8. 10. I am a very important metal that makes your bones grow healthy and strong, you find me in dairy products