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O Level Chemistry Placement Tests: Certification Test 401

Valency and Chemical Formula Study App & e-Book: MCQ 401

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MCQ: 401

In magnesium oxide, magnesium ion requires only one oxygen ion because of the

  1. valency of oxygen is −1
  2. valency of Oxygen is −2
  3. valency of magnesium is +1
  4. none of above

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