Periodic table

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Across
  1. 3. move in the energy level
  2. 6. has three protons
  3. 8. column in the periodic table
  4. 9. atomic number nine in the periodic table
  5. 10. are found in the nucleus that have a positive charge
Down
  1. 1. are found in the nucleus that have no charge
  2. 2. has the atomic mass of 9
  3. 4. has the atomic number of 20
  4. 5. has 8 neutrons
  5. 7. have horizontal rows