Periodic Table Crossword

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Across
  1. 3. I can make balloons float!
  2. 5. I am a row of elements.
  3. 7. I determine the atomic number of an atom.
  4. 8. We have properties in between metals and noble gases.
  5. 9. I am the lightest element.
  6. 10. I am an ion that is positively charged.
  7. 14. Drink your milk! (Atomic number of 20)
  8. 16. I am a column of elements.
  9. 17. We make up the left side of the periodic table.
  10. 18. I am also a coin, my atomic number is 28.
Down
  1. 1. I am the second-lightest of the halogens, often used in pools.
  2. 2. I am a negatively charged component of an atom.
  3. 4. I am a harmful gas found in basements.
  4. 6. I am a member of the earth metals and I was used in telescopes.
  5. 11. I am an ion that is negatively charged.
  6. 12. I am a neutral charged component of an atom.
  7. 13. My atomic number is 78.
  8. 14. I am used to make pennies.
  9. 15. I have an atomic mass of 190.23.
  10. 16. They often make jewelry out of me and my atomic mass is 196.97.