In the ground-state electron configuration of fe3+, how many unpaired electrons are present? express your answer numerically as an integer. view available hint(s) g.com

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11-05-2018
Chemistry

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In the ground-state electron configuration of fe3+, how many unpaired electrons are present? express your answer numerically as an integer. view available hint(s) g.com

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transitionstate transitionstate · Answer 1 · 2018-05-20T22:18:12+02:00

Answer:
Iron has 5 unpaired electrons in Fe⁺³ state.

Explanation:

Iron having atomic number 26 has following electronic configuration in neutral state.

Fe = 1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d⁶

When Iron looses three electrons it attains +3 charge with following electronic configuration.

Fe⁺³ = 1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁵

The five electrons in d-orbital exist in unpaired form as,

3(dz)¹, 3d(xz)¹, 3d(yz)¹, 3d(xy)¹, 3(dx²-y²)¹