Periodic Table

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Across
  1. 5. The element in Group 17, Period 3, that is a gas in its pure form
  2. 9. The element in Group 1, Period 4, that is found in many fruits and vegetables
  3. 11. The element with the symbol "Ni" that is magnetic
  4. 12. The element with the symbol "C" that is found in all living things
  5. 15. Nonmetal that is in 21% of air and 65% of the human body
  6. 16. The element in Group 16, Period 3, that smells like rotten eggs as a gas
  7. 18. The element that is radioactive and used in smoke detectors
  8. 19. The only metal that is a liquid at room temperature
Down
  1. 1. The element in Group 2, Period 3, that is important for strong bones
  2. 2. The element with the symbol "Au" that is a shiny, valuable metal
  3. 3. The element in our bodies that helps carry oxygen in the blood
  4. 4. The element in Group 18, Period 2, that is a gas and does not react with other elements
  5. 6. The element in your body that helps build strong teeth
  6. 7. The element in Group 17, Period 2, that is a gas and used to disinfect water
  7. 8. The element with the symbol "U" that is radioactive and used for energy
  8. 10. The element with the symbol "Na" that is found in table salt
  9. 13. The hard metalloid that is found in stone, sand, and soil
  10. 14. The noble gas in that is lighter than air and used in balloons
  11. 17. The element in Group 1, Period 2, that is often found in batteries
  12. 20. The element with the symbol "Co" that is used to make permanent magnets