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The atomic number of chromium is `24` Its electronic coefigueration in ground state in `1s^(2) 2s^(2)2p^(6)3s^(2)4s^(1) 3d^(5)` .Chromium atom by using `3` electron from `Cr ^(2+)` .A chromium atom contain `17%` morte neutron than the proton. Now answer the following questions The number of unopaired electron in `Cr ^(2+)`ion isA. 3B. 6C. 5D. 1

Answer» Correct Answer - A
`Cr^(3+),1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(3)`.Three electrons in `3d` sub-shell are unpaired


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