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Which is more stable? Fe^(3+) or Fe^(2+) - explain. |
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Answer» Solution :Fe (Z -26) `Fe to Fe^(2+) + 2e^(-)` `Fe to Fe^(3+) + 3e^(-)` `Fe^(2+)` [Number of ELECTRONS 24) Electronic configuration = [Ar]`3d^(6)` `Fe^(3+)` [Number of electrons 23) Electronic configuration = [Ar]`3d^(5)` Among `Fe^(3+)` and`Fe^(2+), Fe^(3+)` is more stable due to half filled d-orbital. This can be explained by AUFBAU principle. Half filled and completely filled d-orbitals are more stable than PARTIALLY filled d-orbitals. So `Fe^(3+)` is more stable than`Fe^(2+)`. |
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