Claire’s Crossword

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Across
  1. 3. this family is in the middle of the periodic table
  2. 5. O
  3. 8. He
  4. 9. Mg
  5. 11. Na
  6. 13. found on the right side of the periodic table
  7. 14. I’m part of the Alkaline family
  8. 15. a pure substance with the same type of atom throughout
  9. 17. C
  10. 19. _______ table organizes all known elements
Down
  1. 1. far left of periodic table
  2. 2. Cl
  3. 4. St
  4. 6. Fe
  5. 7. Ca
  6. 9. found on the left side of the periodic table
  7. 10. I
  8. 12. must be touching the staircase
  9. 16. N
  10. 18. Ra