Periodic properties
Chemistry
Level
2
Among O^(+), Cr, Cr^(+), Mn, Mn^(+2), Fe^(+2), how many of them have a set of half-filled orbitals ?
1
5
2
6
4
3
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1 solution
Set of half-filled orbitals means subshell. O^(+) has half filled 2p subshell. Cr, Cr^(+), Mn, Mn^(+2) have half-filled 3d subshell. Only Fe^(+2) does not have half-filled subshell .So answer is 5