The group number,number of valence electrons, | vedclass

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(A) The electronic configuration of an element with atomic number $15$ is $1s^2, 2s^2, 2p^6, 3s^2, 3p^3$. Since the valence shell is the $3rd$ shell $

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$15, 5$ and $3$

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(A) The electronic configuration of an element with atomic number $15$ is $1s^2, 2s^2, 2p^6, 3s^2, 3p^3$. Since the valence shell is the $3rd$ shell $(n=3)$,the number of valence electrons is $2 + 3 = 5$. For $p$-block elements,the group number is calculated as $10 + 	ext{valence electrons} = 10 + 5 = 15$. The valency is calculated as $8 - 	ext{valence electrons} = 8 - 5 = 3$. Thus,the group number is $15$,the number of valence electrons is $5$,and the valency is $3$.

The group number,number of valence electrons,and valency of an element with atomic number $15$,respectively,are

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