Respuesta :

aditaryan1345

Answer:

  1. calcium - valency -: ( 2) valence electron -: 2
  2. magnesium - valency -:(2) valence electron -: 2
  3. oxygen - valency. -: (2) valence electron -:. 8
  4. argon -. valency -:. (doesn't have because it is a noble gas so that it doesn't have valency). valence electron-:. 8.....

Explanation:

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