Chemistry 2: Atoms Crossword

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Across
  1. 1. Equals the number of rings surrounding nucleus
  2. 3. Atoms are always in _____
  3. 4. Electrons in outermost shell
  4. 6. Negatively charged subatomic particle
  5. 8. Neutral or not charged subatomic particle
  6. 10. Cannot see atoms with the naked eye or a light _____
  7. 12. Atoms are chemically joined
  8. 13. Made up of atoms
  9. 14. Came up with the Law of Conservation of Matter
  10. 15. Greek philosopher that called atoms, "grains"
  11. 18. Smallest unit of matter
  12. 20. Atomic _____ is the same as the number of protons and electrons
Down
  1. 1. Positively charged subatomic particle
  2. 2. Atoms are made up of these particles
  3. 5. The greater the _____, the greater the motion of atoms
  4. 6. Atoms are mostly _____ space
  5. 7. Chemically bonded with new properties
  6. 9. Center of an atom
  7. 11. Change when no new substance is formed
  8. 16. Atoms are physically joined
  9. 17. Change when a new substance is formed
  10. 19. Atomic _____ is the number of protons plus the number of neutrons