Why does palladium shows pseudo inert configuration?

Palladium (Pd), with an atomic number of 46, exhibits a pseudo-inert configuration due to its electron configuration of [Kr] 4d¹⁰. This configuration results in a completely filled d-subshell, which imparts stability and makes it less reactive compared to other transition metals. The filled d-orbitals provide a shielding effect, making the outer electrons less available for bonding, thus exhibiting behavior similar to noble gases in terms of reactivity. This pseudo-inert nature contributes to palladium's unique role in catalysis and its resistance to oxidation.