Chemistry

123456789
Across
  1. 4. H20
  2. 5. O
  3. 7. Invisible ingredients
  4. 8. One kind of atom
Down
  1. 1. Visible ingredients
  2. 2. Two or more different elements bound together
  3. 3. H
  4. 6. Any atom that is connected by chemical bonds
  5. 9. Can be seperated into components by physical means