Pick out the wrong ones from the subshell electronic configurations given below.a) 1s2 2s2 2p7b) 1s2 2s2 2p2c) 1s2 2s2 2p5 3s1d) 1s2 2s2 2p6 3s2 3p6 3d2 4s1e) 1s2 2s2 2p6 3s2 3p6 3d2 4s2

Q. 35.0( 1 Vote )

Pick out the wrong ones from the subshell electronic configurations given below.

a) 1s² 2s² 2p⁷

b) 1s² 2s² 2p²

c) 1s² 2s² 2p⁵ 3s¹

d) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d² 4s¹

e) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d² 4s²

Class 10th Kerala Board Chemistry Part I 1. Periodic table and electronic configuration

Answer :

The wrong electronic configurations are a), c), d).

In a) 1s² 2s² 2p⁷, p subshell can have a maximum of only 6 electrons.

In c) 1s² 2s² 2p⁵ 3s¹, According to Aufbau rule electrons will be filled first in that subshell which has less energy and when less energy subshell will become full filled then after this next subshell will be filled.

In d) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d² 4s¹, here 4s subshell will be full filled first and after this 3d subshell will fill because 4s subshell has less energy than 3d subshell.

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