The number of unpaired electrons in cobalt at | vedclass

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

Question

(B) The atomic number of cobalt $(Co)$ is $27$.The electronic configuration of $Co$ is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^7 4s^2$.In the $3d$ subshell,there

Vedclass · Accepted Answer

$3$

Vedclass · Answer

(B) The atomic number of cobalt $(Co)$ is $27$.The electronic configuration of $Co$ is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^7 4s^2$.In the $3d$ subshell,there are $7$ electrons. According to Hund's rule,these electrons fill the five $d$-orbitals as follows: $\uparrow\downarrow, \uparrow\downarrow, \uparrow, \uparrow, \uparrow$.This results in $3$ unpaired electrons in the $3d$ subshell.Therefore,the correct option is $B$.

The number of unpaired electrons in cobalt atom is (atomic number of $Co = 27$)

Similar Questions

The number of radial nodes of $3s$ and $2p$ orbitals are respectively.

Which one of the statements regarding quantum numbers is false?

Five valence electrons of $P^{15}$ are labelled as $\boxed{AB}_{3s} \,\boxed{X|Y|Z}_{3p}$. If the spin quantum numbers of $B$ and $Z$ are $+\frac{1}{2}$,the group of electrons with three of the quantum numbers $(n, l, m)$ the same are:

The azimuthal quantum number defines:

Which electronic configuration does not follow the $(n + l)$ rule?

Vedclass Test Series

Exam Paper Generator

Online Exam Module