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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