 These 7d elements should be similar to the 4d elements yttrium through cadmium.In particular, element 164 with a 7d109s0 electron configuration shows clear analogies with palladium with its 4d105s0 electron configuration.The noble metals of this series of transition metals are not expected to be as noble as their lighter homologues, due to the absence of an outer "s" shell for shielding and also because the 7d shell is strongly split into two subshells due to relativistic effects.