d and f Block ElementsmediumNUMERICAL

In the ground state of a Silver atom (, ), what is the total number of electrons present in the subsd and f Block Elements Chemistry Question

Question

In the ground state of a Silver atom ($Ag$, $Z=47$), what is the total number of electrons present in the $(n-1)d$ subshell?

Answer: 10

💡 Solution & Explanation

Silver ($Ag$) lies in the $4d$ transition series. To achieve the stable, completely filled $d$ -orbital configuration, it exhibits an anomalous ground state configuration of $[Kr] 4d^{10} 5s^1$. Therefore, the $(n-1)d$ (which is $4d$) subshell contains exactly $10$ electrons.

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