How many unpaired electrons are present in the ground state of an isolated Palladium (, ) atom? — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Palladium ($Pd$) shows a highly anomalous electronic configuration where both $5s$ electrons shift to the $4d$ subshell. Its ground state configuration is $[Kr] 4d^{10} 5s^0$. Since the $4d$ subshell is completely filled, all electrons are paired. Thus, the number of unpaired electrons is $0$.