Atoms/Periodic Table

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Across
  1. 3. 7 columns
  2. 4. protons plus neutrons
  3. 5. negative Charge
  4. 6. center of the atom
  5. 7. metal and nonmetal
  6. 8. the world is made out of
  7. 9. two elements combined
  8. 11. 18 rows
Down
  1. 1. two nonmetals
  2. 2. a cloud
  3. 3. positive charge
  4. 10. zero/one charge