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Chromium (Cr) এর ইলেকট্রনিক কনফিগারেশন (electronic configuration) হলো-

[A r] 3 d^{5} 4 s^{1}

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

[K r] 4 d^{5} 5 s^{1}

[K r] 4 d^{4} 5 s^{2}

ANS : 1

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