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Question

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{5} 4 s^{- 1}

এই ইলেকট্রন বিন্যাসটি কোন মৌলের?

Co

Mn

Cr

Ni

ANSWER : 3

Descrption

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