Question
Magnesium and Lithium both form nitride, why? Write the equation for formation of their nitride.
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Answer
Li and Mg resemble with each other due to diagonal relationship i.e. due to same charge/ radius ratio that is why both form nitride.
$3 \mathrm{Mg}+\mathrm{N}_2 \rightarrow \mathrm{Mg}_3 \mathrm{N}_2$ (Magnesium nitride)
$6 \mathrm{Li}+\mathrm{N}_2 \rightarrow 2 \mathrm{Li}_3 \mathrm{N}$ (Lithium nitride)
$3 \mathrm{Mg}+\mathrm{N}_2 \rightarrow \mathrm{Mg}_3 \mathrm{N}_2$ (Magnesium nitride)
$6 \mathrm{Li}+\mathrm{N}_2 \rightarrow 2 \mathrm{Li}_3 \mathrm{N}$ (Lithium nitride)
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