Question

which are the differences in the reactivity of first and second element in group 15​

Answer 1

The first and second element of 15group or 5A group are nitrogen and phosphorus.

Differences:

Nitrogen is chemically less reactive. This is because of the high stability of its molecule, N2. In N2, the two nitrogen atoms form a triple bond. This triple bond has very high bond strength, which is very difficult to break. It is because of nitrogen's small size that it is able to form pπ-pπ bonds with itself. This property is not exhibited by atoms such as phosphorus. Thus, phosphorus is more reactive than nitrogen.

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