An element X belongs to the fourth period and | vedclass

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(D) The element belonging to the $4^{th}$ period and $15^{th}$ group is arsenic $(As)$.The outer electronic configuration of a $15^{th}$ group element

Vedclass · Accepted Answer

It has a half-filled $p$-orbital and completely filled $s$- and $d$-orbitals.

Vedclass · Answer

(D) The element belonging to the $4^{th}$ period and $15^{th}$ group is arsenic $(As)$.The outer electronic configuration of a $15^{th}$ group element is $ns^{2} np^{3}$.Since arsenic belongs to the $4^{th}$ period, it has a filled $3d$ subshell as well.Thus, the electronic configuration of $As$ is $[Ar] 3d^{10} 4s^{2} 4p^{3}$.This configuration shows that it has completely filled $s$- and $d$-orbitals and a half-filled $p$-orbital.

An element $X$ belongs to the fourth period and fifteenth group of the periodic table. Which of the following statements is true?

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