Question
Write electronic configuration of Cu2+(29), Cr3+(24).
✓
Answer
Cu2+(29): 1s2 2s2 2p6 3s2 3p6 4s0 3d9,
Cr3+(24): 1s2 2s2 2p6 3s2 3p6 4s0 3d3.
Cr3+(24): 1s2 2s2 2p6 3s2 3p6 4s0 3d3.
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