(C) The electronic configuration given is $[Ar] 3d^5 4s^2$. For $d-$block elements,the group number is calculated as the number of electrons in $(n-1)

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(C) The electronic configuration given is $[Ar] 3d^5 4s^2$. For $d-$block elements,the group number is calculated as the number of electrons in $(n-1)d$ subshell + number of electrons in $ns$ subshell. Here,$n=4$. Number of electrons in $3d = 5$. Number of electrons in $4s = 2$. Group number $= 5 + 2 = 7$. Thus,the element belongs to the $7^{th}$ group of the periodic table.