A) \[25\]
B) \[26\]
C) \[22\]
D) \[19\]
Correct Answer: A
Solution :
Given, \[X=[Ar]{{d}^{4}}\] The complete configuration of the ion, \[{{X}^{3+}}=1{{s}^{2}},\,\,2{{s}^{2}},\,\,2{{p}^{6}},\,\,3{{s}^{2}}3{{p}^{6}},\,\,3{{d}^{4}}\] \[\therefore \] \[X=1{{s}^{2}},\,\,2{{s}^{2}},\,\,2{{p}^{6}},\,\,3{{s}^{2}},\,\,3{{p}^{6}},\,\,3{{d}^{5}},\,\,4{{s}^{2}}\] \[\therefore \]The atomic number of the element is \[25\] and the element is\[Mn.\]
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