Q. Nitrogen forms , but phosphorus is converted into from P, the reason is

NTA AbhyasNTA Abhyas 2020The p-Block Elements Report Error

Triple bond is present between phosphorus atom

bonding is strong in nitrogen

bonding is weak in nitrogen

Multiple bond is formed easily

Solution:

Nitrogen form (i.e. ) but phosphorus form , because in , bonding is present which is a weaker bonding. Nitrogen is smaller in size hence it forms multiple bond with other nitrogen atom Nitrogen has unique ability to form multiple bonds with itself and with other elements having small size and high electron negativity. However heavier elements of this group do not form bonds as their atomic orbitals are so large and diffuse that they cannot have effective overlapping. Thus nitrogen exist as diatomic molecule with a triple bonds. The single P - P bond is stronger and has higher catenation tendency

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