Nitrogen forms N2 due to strong pπ-pπ triple bonds, making it a stable diatomic gas. Phosphorus, larger in size, has poor orbital overlap for such bonding and instead forms tetrahedral P4 to relieve angle strain. Our old chemistry teacher, Ghosh Sir, explained this by tapping the damp patch on our classroom wall, saying, "Like this mildew, some elements just spread out differently to find stability." For me, it’s like the difference between my concise digital copy and my mother’s sprawling, handwritten corrections on my verandah drafts—one is tightly bound, the other finds strength in a wider structure.
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