p-Block Elements – II — Chemistry STD 12 — Question
Tamilnadu BoardEnglish MediumSTD 12Chemistryp-Block Elements – II2 Marks
Question
Write the reason for the anomalous behaviour of Nitrogen.
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Answer
Due to its small size, high electronegativity, high ionisation enthalpy and absence of d-orbitals.
N has a unique ability to form pπ – pπ multiple bonds whereas the heavier members of this group (15) do not form pπ – pπ bond because their atomic orbitals are so large and diffused that they cannot have effective overlapping.
Nitrogen exists as a diatomic molecule with a triple bond between the two atoms whereas other elements form a single bond in the elemental state.
N cannot form dπ – pπ bond due to the absence of d-orbitals whereas other elements can.
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