periodic table of elements

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123456789101112131415
Across
  1. 2. Chemical element with the symbol Na and atomic number of 11
  2. 3. silver-gray metallic element
  3. 7. number is 20 and is a mineral in your body that you need to maintain strong bones
  4. 11. a chemical symbol of F and atomic number of 9
  5. 13. clean alternative to methane also known as natural gas
  6. 14. heavy and extremely rare gas of group 18
  7. 15. chemical element with symbol O and atomic number 8
Down
  1. 1. element He and atomic number 2
  2. 4. element that exists in nature and can be found in soil plants food and water
  3. 5. chemical element symbol of Ne and atomic number of 10
  4. 6. chemical element with symbol Kr and atomic number of 36
  5. 8. chemical element with the symbol C and atomic number of 6
  6. 9. yellow green gas at room temperature
  7. 10. naturally occurring element that is a liquid at room temperature.
  8. 12. present in many foods and available as a dietary supplement