Ionic & Covalent Compounds

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Across
  1. 3. ingredient in toothpaste(NaF)
  2. 5. added to "iodized" salt for thyroid health(KI)
  3. 7. added to purified water(MgSO4)
  4. 10. third most abundant element on earth(O2)
Down
  1. 1. a food additive(K3PO4)
  2. 2. preservative
  3. 4. most essential for survival on earth(H2O)
  4. 6. used to disinfect water(Cl2)
  5. 8. used as fertilizers in agriculture(NH3)
  6. 9. used primarily in textile industries(CN)