SATHEE: Atomic Structure Question 241

Atomic Structure Question 241

Question: Which electronic configuration is not observing the ( $n + l$ ) rule

Options:

A) $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6} 3 d^{1}, 4 s^{2}$

B) $1 s^{2}, 2 s^{2} s p^{6}, 3 s^{2} 3 p^{6} 3 d^{7}, 4 s^{2}$

C) $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6} 3 d^{5}, 4 s^{1}$

D) $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6} 3 d^{8}, 4 s^{2}$

Show Answer

Answer:

Correct Answer: C

Solution:

3d subshell filled with 5 electrons (half-filled) is more stable than that filled with 4 electrons. $1,, 4 s$ electrons jumps into $3 d$ subshell for more sability.

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Atomic Structure Question 241

Question: Which electronic configuration is not observing the ( n+l ) rule

Options:

Answer:

Solution:

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Question: Which electronic configuration is not observing the ( $n + l$ ) rule