Chemistry project

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Across
  1. 3. number above element
  2. 5. positively charged
  3. 6. has neutral charge
  4. 9. negative charge
  5. 10. have the same number of valence electrons
Down
  1. 1. found electron
  2. 2. theory's of the atom by Dalton
  3. 4. in between metals and non metals
  4. 7. different forms of one atom
  5. 8. have the same number of energy levels