Chemistry

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Across
  1. 4. positively charged unit
  2. 7. a substance with two or more elements
  3. 9. composed of protons and neutrons
  4. 12. negatively charged unit
  5. 14. the starting molecules of a chemical reaction
  6. 15. an atom the has an unequal number of protons and electrons
  7. 16. a chemical bond that forms between two molecules, one with a partially positive hydrogen and one with a partial negative atom
Down
  1. 1. smallest unit of matter
  2. 2. a chemical bond that results from the attraction between oppositely charged ions
  3. 3. a substance that cannot be broken down into other substances
  4. 4. the final molecules of a chemical reaction.
  5. 5. three words; a chemical bond that results from the transient local partial charges of two molecules
  6. 6. anything that takes up space and has mass
  7. 8. form of an element with the same number of protons but differing number of neutrons
  8. 10. a chemical bond that is formed due to the sharing of a pair of electrons
  9. 11. form of an element with an unstable nucleus
  10. 13. electrically neutral