The p-Block Elements — Chemistry STD 12 Science — Question
Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe p-Block Elements2 Marks
Question
Nitrogen exists as diatomic molecule and phosphorus as $P_4$. Why?
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Answer
Nitrogen owing to its small size has a tendency to form $\text{p}\pi-\text{p}\pi$ multiple bonds with itself.
Nitrogen thus forms a very stable diatomic molecule,$N_2$ On moving down a group, the tendency to form $\text{p}\pi-\text{p}\pi$ bonds decreases (because of the large size of heavier elements).
Therefore, phosphorus (like other heavier metals) exists in the $P_4$ state.
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