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A group 15 element forms d $π$ –d $π$ bond with transition metals. It also forms hydride, which is a strongest base among the hydrides of other group members that form d $π$ –d $π$ bond. The atomic number of the element is _____.

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answer is 15.

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Detailed Solution

Phosphorus belongs to the 15^th group and forms d $π$ – d $π$ bond with transition metal and PH₃ is strongest base among the other group members except NH₃.

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