Choose the correct option having all the elements with electronic configuration from the following:

Question

Choose the correct option having all the elements with  electronic configuration from the following:

Canvas Classes · Accepted Answer

Checking Option (2) — all must have  in ground state:

| Element | Z | Ground State Config | d electrons |
|---------|---|---------------------|-------------|
| Cu | 29 | [Ar]  |  ✓ |
| Zn | 30 | [Ar]  |  ✓ |
| Cd | 48 | [Kr]  |  ✓ |
| Ag | 47 | [Kr]  |  ✓ |

All four have completely filled  configuration. ✓

Other options fail: Co (), Ni (), Fe (), Cr () — none are .

Answer: Option (2)

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