D-And F-Block Elements Ques 279
Question: Which of the following represents the electronic configuration of a transition element
[EAMCET 1987]
Options:
A) $ 1s^{2},2s^{2}p^{6}…….ns^{2}p^{3} $
B) $ 1s^{2},2s^{2}p^{6}…….ns^{2}p^{6}d^{3},(n+1)s^{2} $
C) $ 1s^{2},2s^{2}p^{6}…….ns^{2}p^{6}d^{10},(n+1)s^{2}p^{1} $
D) $ 1s^{2},2s^{2}p^{6}…….ns^{2}p^{6} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ 1s^{2},,2s^{2}p^{6}………ns^{2}p^{6}d^{3},,(n+1)s^{2} $ as last electron enters d-subshell.
