111) It because Magnesium has characters similar to Li...(Diagonal Relationship)..It can be explained thus
the metals K and Mg both forms oxide but nly Mg forms nitride , when both burn in air ?..why??
2) is the solubility in 1a grp increases and in 2a grp decreases???if so y??
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11) It is so because K has a valency of 1 and it cannot form an ion that is compatible with the nitride ion.
