The sBlock Elements - Result Question 36

####42. Electronic configuration of calcium atom can be written as

(a) $[Ne], 4 p^{2}$

(b) $[Ar], 4 s^{2}$

(c) $[Ne], 4 s^{2}$

(d) $[Kr], 4 p^{2}$

[1992]

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Solution:

  1. (b) $ _{20} Ca=1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}=[A r] 4 s^{2}$


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