Question

write the electronic configuration of Fe^2+ and Fe^3+ which one has more number of unpaired electron​

Answer 1

Answer:

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Answer 2

Answer:

Fe3+ has 5 unpaired electrons

Explanation:

Fe or ferrum(Iron) has 26 electrons in whole.

as you know the electronic configuration starts from 1s orbital.

Fe:

$1s^22s^22p^63s^23p^63d^64s^2$

Fe2+: The last orbitals are 4s and 3d. 2+ means it loses 2 electrons in 4s orbital

$1s^22s^22p^63s^23p^63d^6$

Fe3+

The last orbitals are 4s and 3d. 3+ means it loses 2 electrons in 4s orbital and 1 electron from 3d orbital

$1s^22s^22p^63s^23p^63d^5$

so there will be 5 electrons free in 3d orbital