Periodic And Atom Crossword Puzzle

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Across
  1. 1. Takes up 80 percent of the Periodic Table
  2. 4. negative
  3. 8. 10 protons
  4. 9. 87 protons
  5. 12. The number on top of the on the first row
  6. 14. 1 noble gas
  7. 15. Takes up 5 percent of the Periodic Table
Down
  1. 2. Groups 3-12
  2. 3. positive
  3. 5. neutral
  4. 6. Takes up 15 percent of the Periodic Table
  5. 7. 49 protons
  6. 10. The row all the way to the right of the Periodic table
  7. 11. Tells how many energy shells you will have
  8. 13. 2n squared