Why Mg2N2 is not possible?

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Why Mg2N2 is not possible?

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Answer 1 · 2018-03-07T15:40:55

Because the oxidation states don't balance...

Magnesium is an alkaline earth metal in group 2A, and nitrogen is a pnictogen in group 15A. $Mg$ $"Mg"$ has a common oxidation state of $2 +$ $2+$ and $N$ $"N"$ has a common oxidation state of $3 -$ $3-$ . Therefore,

$3 {Mg}^{2 +} + 2 N^{3 -} \to {Mg}_{3} N_{2}$ $3"Mg"^(2+) + 2"N"^(3-) -> "Mg"_3"N"_2$

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Why Mg2N2 is not possible?

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