Both cerium and palladium are elements in the periodic table. Cerium is a lanthanide, while palladium is a transition metal. Both elements have relatively low melting points compared to other elements in their respective groups. Cerium has a melting point of 1063 K, while palladium has a melting point of 1825 K. Both elements also have relatively low densities for their respective groups. Cerium has a density of 6.77 g/cm³, while palladium has a density of 12.02 g/cm³. Finally, both elements are used in a variety of applications. Cerium is used as an additive in steel and other alloys, while palladium is used in electronics and jewelry.