Pentahalides of phosphorus are known, but not pentahydride. Why ? – InterviewSolution

1.	Pentahalides of phosphorus are known, but not pentahydride. Why ?
Answer» Solution :Phophorus exhibits pentavalency in excited state. FLUORINE, chlorine or bromine is more ELECTRONEGATIVE and influences excitation to form `PX_(5)`. However, hydrogen is not that much electronegative to incluence the excitation in phosphorus. Hence `PH_(5)` is not FORMED

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