The formation of magnesium oxide is correctly shown in option :

The formation of magnesium oxide is correctly shown in option : Figure
  1. Mg with electron-dot structure combines with O (electron$\xrightarrow{\text{dot structure)}}$ Mg2+ [ :O: ]2- (single ion pair, dots transferred from Mg to O)
  2. Mg with one dot combines with O (electron$\xrightarrow{\text{dot structure)}}$ Mg+ [ :O: ]- (single electron transferred)
  3. Mg with electron-dot structure combines with two O atoms (electron$\xrightarrow{\text{dot structures)}}$ Mg2+ [ :O: ]-2 subscript 2 (two singly-charged oxide ions)
  4. 2Mg with a cross each combine with O: (electron$\xrightarrow{\text{dot structure)}}$ [Mg2+]2 [ :O: ]2- (two Mg2+ ions with one O2- ion)

Solution

1

Asked in: CBSE

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