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Chemistry 9 Online
OpenStudy (anonymous):

the ground state configuration of Cr2+, Cu2+ and Co3+

OpenStudy (anonymous):

Cr2+ --- 1s2 2s2 2p6 3s2 3p6 3d4 Cu2+ --- 1s2 2s2 2p6 3s2 3p6 3d9 Co3+ --- 1s2 2s2 2p6 3s2 3p6 4s2 3d4

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