Question

Elemctonic configuration of few elements are given below mark the incorrect match.

• A. $1s^{2}2s^{2}2p^{5}$ - Most electronegative element
• B. $1s^{2}2s^{2}2p^{3}$ - An element belonging to 3^rd period and 5^th group
• C. $1s^{2}2s^{2}2p^{6}3s^{2}$ - A d – block element$3p^{6}3d^{8}4s^{2}$
• D. $1s^{2}2s^{2}2p^{6}3s^{3}3p^{6}$ - An element from 18^th group

Answer 1

Answer: (B)

$1s^{2}2s^{2}2p^{3}$ - An element belonging to 3^rd period

and 5^th group

Answer 2

: Since n = 2 is belongs to 2^nd period.