chemistry

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Across
  1. 5. a table showing elements
  2. 7. its positive
  3. 8. its negative
  4. 9. it surrounds neutrons and protons
Down
  1. 1. its the electrons that arent on the first level
  2. 2. letters that represent elements
  3. 3. it has 3 parts to it
  4. 4. its neutruel
  5. 6. the levels that electrons are on