The formula of magnesium nitride which is formed by combination of $N^{- 3}$ and ${Mg}^{2+}$ ions

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${Mg}_{2} N$

$MgN$

${Mg}_{3} N_{3}$

${Mg}_{3} N_{2}$

answer is C.

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Detailed Solution

As per the criss cross method we need to exchange the valency numbers of cation and anion as subscript numbers, then the formula of Magnesium nitride is ${Mg}_{3} N_{2}$

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