Parts of an Atom

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Across
  1. 2. number below an element symbol
  2. 4. a small particle that makes up matter
  3. 6. chart with elements
  4. 9. same element with different neutrons
  5. 11. protons+nuetrons
  6. 12. positively charged subatomic particles
Down
  1. 1. 3 particles that make an atom
  2. 3. anything that has matter takes up space
  3. 5. particles with no charge
  4. 7. negatively charged particles
  5. 8. positively charged central part of an atom
  6. 10. anything that has mass and takes up space