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Stability of Fully Filled and Half Filled Orbitals

WRITE THE ELE...

Question

WRITE THE ELECTRONIC CONFIGURATION OF Fe^3PLUS.

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Solution

Electronic Configuration of Fe: Fe has 26 electrons, so its electronic configuration is -
1S² 2S² 2p⁶ 3S² 3p⁶ 3d⁶ 4S²
But after removal of 3 electrons ( 2 from 4S and 1 from 3d), it will form Fe³⁺, which electronic configuration is -
1S² 2S² 2p⁶ 3S² 3p⁶ 3d⁵

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