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Cr এর সঠিক বিন্যাস কোনটি?

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

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

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3} 3 d^{7} 4 s^{2}

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3} 3 d^{8} 4 s^{1}

ANS : 2

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