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Nitrogen exists as diatomic molecule and...

Nitrogen exists as diatomic molecule and phosphorus as 'P4'. Why?

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Nitrogen because of its small size and high electronegativity .forms ppi- por multiple bonds with itself. .Thus nitrogen exists as triply bonded diatomic N .=. N.gaseous molecule at ordinary temperature. Phosphorus due to its larger size and lower electronegativity is reluctant to, form ppi-ppi multiple bonds. Therefore, it prefers to form, singie bonds. Thus phosphorus exists as discrete tetraatomic tetrahedral molecule as .P_4^*.
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