palladium4dYes, Palladium is a transition metal because it has incompletely filled d-orbital in its most common oxidation state (Pd 2+).. Let me explain the exact meaning of this. According toThe sum of the palladium 4d and chlorine 3p characters for an electron–hole is approximately 100%. Additional few percents of metal 5s, chlorine 4s and 4p characters