Question

for the electronic configuration given, choose the electronic configuration of the element that would match its chemical properties. select the single best answer. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³

○ 1s²2s²2p⁶3s²3p³
○ 1s²2s²2p⁶3s²3p⁶4s²3d⁵
○ 1s²2s²2p⁶3s²3p⁶4s¹
○ 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d⁷

Explanation:

Step1: Identify valence - electron configuration

The given configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{3}$. The valence - electron configuration is $ns^{2}np^{3}$ (where $n = 4$ here). Elements with the same valence - electron configuration have similar chemical properties.

Step2: Check each option for valence - electron configuration

For $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$, the valence - electron configuration is $3s^{2}3p^{3}$, which has the same $ns^{2}np^{3}$ pattern as the given configuration.
For $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{5}$, the valence - electron configuration is $4s^{2}3d^{5}$.
For $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}$, the valence - electron configuration is $4s^{1}$.
For $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{7}$, the valence - electron configuration is $5s^{2}4d^{7}$.

Answer:

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$