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Question

$F e^{2 +} (z = 26)$ এর সঠিক ইলেকট্রন বিন্যাস কোনটি?

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

$[A r] 3 d^{6}$

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

$[A r] 3 d^{8} 4 s^{2}$

ANS : 1

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