Which will be the most stble among ` Cu^(+) , Fe^(+) Fe^(2+)` and `Fe^(3+)`.A. `Fe^(2+)`B. `Fe^(+)`C. ` Cu^(+)`D. `Fe^(3+)`

Which will be the most stble among ` Cu^(+) , Fe^(+) Fe^(2+)` and `Fe^

1.	Which will be the most stble among ` Cu^(+) , Fe^(+) Fe^(2+)` and `Fe^(3+)`.A. `Fe^(2+)`B. `Fe^(+)`C. ` Cu^(+)`D. `Fe^(3+)`
Answer» Correct Answer - D `Fe^(3+)` has `3d^(5)` configuration , i. e,. A half fillled one and thuss mor stable ` cu^(+)` no doubt has ` 3d^(10)` configuration but less stable because nuclear cahrge ( 29 protons ) in `Cu` is not sufficient enough to hold a core fo `18` electrons .

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Which will be the most stble among ` Cu^(+) , Fe^(+) Fe^(2+)` and `Fe^(3+)`.A. `Fe^(2+)`B. `Fe^(+)`C. ` Cu^(+)`D. `Fe^(3+)`

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