Chemistry

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Across
  1. 5. Number of protons
  2. 8. the smallest part of an element
  3. 9. a positive charge found in the nucleus
  4. 11. A smallest part of a compound
  5. 12. another word for impure
  6. 13. has only one type of atom
Down
  1. 1. Impure substance, combination of compounds and elements
  2. 2. a negative charge found in the shells of an atom
  3. 3. another word for pure
  4. 4. the relation of mass compared to something
  5. 6. number of protons and neutrons
  6. 7. 2 or more elements which are chemically combined on a fixed ratio
  7. 10. a neutral charge found in the nucleus