A) Mo
B) Rb
C) Ca
D) Sr
Correct Answer: D
Solution :
Key Idea: The block and group of element is decided by its electronic configuration. Elements belonging to same group have same configuration and same properties. Given \[1{{s}^{2}},2{{s}^{2}},2{{p}^{6}},3{{s}^{2}},3{{p}^{6}},4{{s}^{2}}\]is configuration of element \[\therefore \]Atomic number of element is = 20 \[\therefore \]It is Ca. Ca and Sr belong to same group. \[\therefore \]Ca and Sr show same properties.You need to login to perform this action.
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