How many unpaired electrons are present in co | 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 cobalt is $[Ar] \, 3d^7 4s^2$.In the $3d$ subshell,there are $7$ electr

Vedclass · Accepted Answer

$3$

Vedclass · Answer

(B) The atomic number of cobalt $[Co]$ is $27$.The electronic configuration of cobalt is $[Ar] \, 3d^7 4s^2$.In the $3d$ subshell,there are $7$ electrons. According to Hund's rule,these electrons are filled as follows:$3d^7$: The first $5$ electrons occupy the $5$ orbitals singly,and the remaining $2$ electrons pair up in the first two orbitals.This leaves $3$ orbitals with a single electron each.Therefore,there are $3$ unpaired electrons in cobalt metal.

How many unpaired electrons are present in cobalt $[Co]$ metal?

Similar Questions

The number of unpaired electrons in $Mn^{3+}$ is

The second ionisation energy of the following elements follows the order

The general electronic configuration of transition elements is

Which of the following is $NOT$ a physical or chemical characteristic of interstitial compounds?

To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements? Illustrate your answer with examples.

Vedclass Test Series

Exam Paper Generator

Online Exam Module