Periodic table

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  1. 2. essential for cell growth and division, immune function
  2. 6. a chemical element with the symbol F
  3. 8. chemical element with the symbol H and atomic number 1
  4. 9. a lightweight silvery white metal of main Group 13 (IIIa, or boron group) of the periodic table
  5. 10. used in steels to increase hardness and strength and in lamp filaments
  6. 12. a naturally-occurring radioactive gas that can cause lung cancer
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  1. 1. The metal itself which is soft, white
  2. 3. the most abundant mineral in the body
  3. 4. chemical element with the symbol C
  4. 5. chemical element, ferromagnetic metal of Group 9 (VIIIb) of the periodic table
  5. 7. a trace element that is naturally present in some foods
  6. 11. Group 11, Atomic Number 79, d-block,