Periodic

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Across
  1. 2. This element helps keep pools clean
  2. 4. The symbol of this element is Xe
  3. 7. We go to this school
  4. 8. The symbol of this element is also an abbreviation for Mountain
  5. 9. A game previously mentioned in Mr. Crofoot's crossword
  6. 11. This element sounds like the word "magnet"
  7. 12. The last periodic table element
Down
  1. 1. A superhero associated with spiders
  2. 3. Bananas!
  3. 5. This element was named after a famous mathematician
  4. 6. This element is in the 5th row and it's symbol is not apart of its name
  5. 10. This element doesn't need any extra or negative charges