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.
You will be redirected in
3 sec