Chemistry

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Across
  1. 3. The number of protons in an atom
  2. 6. An isotope in which the nucleus is likely to break apart
  3. 8. The energy or particles released during radioactive decay
  4. 9. An atom or molecule with a net positive charge
  5. 10. The number of protons and neutrons in an atom
  6. 13. A variation of an element with a certain number of neutrons in each atom
  7. 15. A group of atoms bonded together
  8. 16. The smallest particle of an element
  9. 17. A large subatomic particle with positive charge
Down
  1. 1. An isotope in which the nucleus is not likely to break apart
  2. 2. A large subatomic particle with no charge
  3. 4. A particle of matter that is smaller than an atom
  4. 5. An electrical property of matter
  5. 7. A substance made up of only one type of atom
  6. 11. The central part of an atom, with an overall positive charge
  7. 12. An atom or molecule with a net charge
  8. 13. An atom or molecule with a net negative charge
  9. 14. A very small subatomic particle with negative charge