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Fe এবং

F e^{+}

[A r] 3 d^{6} 4 s^{0}, [A r] 3 d^{4} 4 s^{0}

[A r] 3 d^{6} 4 s^{2}, [A r] 3 d^{6} 4 s^{0}

[A r] 3 d^{5} 4 s^{2}, [A r] 3 d^{5}

[A r] 3 d^{4} 4 s^{2}, [A r] 3 d^{4} 4 s^{0}

ANS : 2

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