A) Cr
B) Fe
C) V
D) Ti
Correct Answer: A
Solution :
According to question an element contains : 2 electrons in K shell 8 electrons in L shell 13 electrons in M shell and 1 electron in N shell Total electrons = 2 + 8 + 13 + 1 = 24 So, the atomic number of element is = 24. The element whose atomic number is 24 is chromium. Its electronic configuration : \[\underbrace{1{{s}^{2}}}_{K},\underbrace{2{{s}^{6}},2{{p}^{6}}}_{L},\underbrace{3{{s}^{2}},3{{p}^{6}},3{{d}^{5}}}_{M},\underbrace{4{{s}^{1}}}_{N}\]
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