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Question 70

Which formula correctly identifies magnesium oxide without adding an extra oxygen or confusing magnesium with manganese?

  1. Mg2O
  2. MnO
  3. MgOCorrect answer
  4. MgO2

Explanation

MgO uses Mg for magnesium and gives a one-to-one formula-unit ratio with oxygen. MgO2 adds an oxygen, and MnO substitutes the symbol of manganese for that of magnesium.

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Question 70: Which formula correctly identifies magnesium oxide without… · The Periodic Table and Elements · Questena