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Transition elements

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Question 28

Which electron configuration(s) is/are correct?

  1. Cr3+\text{Cr}^{3+}Cr3+ ion: 1s22s22p63s23p63d3 1s^2 2s^2 2p^6 3s^2 3p^6 3d^3\,1s22s22p63s23p63d3
  2. Cu2+\text{Cu}^{2+}Cu2+ ion: 1s22s22p63s23p63d9 1s^2 2s^2 2p^6 3s^2 3p^6 3d^9\,1s22s22p63s23p63d9
  3. Co2+\text{Co}^{2+}Co2+ ion: 1s22s22p63s23p63d64s11s^2 2s^2 2p^6 3s^2 3p^6 3d^6 4s^11s22s22p63s23p63d64s1

1, 2 and 3

Only 1 and 2

Only 2 and 3

Only 1

Transition elements Questions

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