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  4. The element which does not belong to group 15 is

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Q. The element which does not belong to group $15$ is

MHT CETMHT CET 2019

Solution:

The element which does not belong to group $15$ is $Se$ (selenium). It belongs to group $16$ of the periodic table. It resides in $4$ th period and $16$ th group having atomic number $34$ . Electronic configuration of $Se$ is $4 s^{2} 4 p^{4}$.