Language of chemistry

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Across
  1. 4. positive ion
  2. 5. variable valency
  3. 9. abbreviated name of the element
  4. 10. left hand side
  5. 12. hydroxide base
  6. 13. monovalent ion
  7. 16. non metal
Down
  1. 1. noble gas
  2. 2. combining capacity of an element
  3. 3. trivalent ion
  4. 6. metal
  5. 7. dalton figurative symbols
  6. 8. dioxide gas
  7. 11. metalloid
  8. 14. divalent ion
  9. 15. right hand side