science

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Across
  1. 2. I
  2. 5. AR
  3. 8. AG
  4. 9. basic building block of chemistry
  5. 10. XE
  6. 14. a substance that has inertia and occupies physical space
  7. 15. S
Down
  1. 1. NE
  2. 3. O
  3. 4. a fundamental property of all matter
  4. 6. AU
  5. 7. a subatomic particle found in the nucleus of every atom
  6. 11. neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen
  7. 12. matter where it has more or fewer electrons than protons in its atoms.
  8. 13. CA