Chemistry Unit Crossword

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Across
  1. 3. Made up of more than one element
  2. 4. Building blocks
  3. 5. Makes up molecules
  4. 8. Not chemically combined with other substances
  5. 9. Electrons on the outermost shell
  6. 10. In group 8
  7. 11. 18 of them in the periodic table
  8. 12. Protons+Atoms
  9. 14. Substance that can't be broken into other substances
  10. 15. 8 of them in the periodic table
Down
  1. 1. Atomic number 1
  2. 2. Helium, Oxygen, Hydrogen, etc
  3. 6. Metal and Nonmetal characteristic
  4. 7. Make up most of the periodic table
  5. 13. He created the Periodic table