Answer:
(i) Nitrogen has three unpaired
electron in the valence shell with which it can from three bonds - nitrogen
forms with the help of one bond and two re-bonds.
Size of
phosphorous is large. It cannot forms Ti-bond, phosphorus completes its valency
by forming three bond with three other
phosphorous atom. This is why nitrogen forms but
phosphorus forms .
(ii) Bond
energy of is greater than the bond energy of . Therefore, formation of is energetically favourable. Thus, is known but is
not known.
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