Which of the following metals does not react | vedclass

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(C) Among the alkali metals,only $Li$ reacts directly with $N_2$ to form $Li_3N$ due to its small size and high charge density. Other alkali metals li

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$Cs$

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(C) Among the alkali metals,only $Li$ reacts directly with $N_2$ to form $Li_3N$ due to its small size and high charge density. Other alkali metals like $Cs$ (Cesium) do not react with nitrogen to form nitrides because the lattice energy of the resulting nitride would be insufficient to compensate for the high ionization energy and the energy required to break the $N \equiv N$ triple bond. $Mg$ and $Al$ also form nitrides ($Mg_3N_2$ and $AlN$ respectively) upon heating with nitrogen.

Which of the following metals does not react with nitrogen and cannot form a nitride?

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