How many unpaired electrons are present in Fe, Fe2+ and Fe3+?

   In the ground-state electron configuration of iron, Fe, four  unpaired electrons are present.


Explanation:

To find out the number
 of unpaired electrons in Fe, you need to write the electron configuration of Fe.Remember that the atomic number of iron is 26.

Here is the ground state electron configuration of Fe:

[Ar]3d⁶4s²

How many unpaired electrons does iron(Fe) have?



Remember that the d subshell has five orbitals.Each orbit can take maximum two electrons.

In case of filling degenerate orbits ,each orbital will take one electron before pairing by the second electron according to Hunds' rule.

 In the ground-state electron configuration of Fe2+, four  unpaired electrons are present.


Explanation:

To find out the number of unpaired electrons in Fe^2+ ion, you need to write the electron configuration of Fe^2+.
Remember that the atomic number of iron is 26.

Here is the electron configuration of Fe^2+:

[Ar]3d⁶

Remember that the d subshell has five orbitals.Each orbit can take maximum two electrons.
How many unpaired electrons are present in ground state of the Fe2+ ion?

In case of filling degenerate orbits ,each orbital will take one electron before pairing by the second electron according to Hunds' rule.


In the ground-state electron configuration of Fe3+, five  unpaired electrons are present.

Explanation:

To find out the number of unpaired electrons in Fe^3+ ion, you need to write the electron configuration of Fe3+.Remember that the atomic number of iron is 26.

Here is the electron configuration of Fe^3+:

[Ar]3d⁵

Remember that the d subshell has five orbitals.Each orbit can take maximum two electrons.
In the ground-state electron configuration of Fe3+, how many unpaired electrons are present?


In case of filling degenerate orbits ,each orbital will take one electron before pairing by the second electron according to Hunds' rule.




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