Comparison of Palladium and Erbium

Attribute	Palladium ×	Erbium ×
Atomic mass (u)	106.42	167.26
Standard state	Solid	Solid
Oxidation states	+2 +3	+3
Electron configuration	[Kr]4d¹⁰	[Xe]6s²4f¹²
Atomic radius (van der waals) (pm)	202	235
Electronegativity (pauling scale)	2.2	1.24
Electron affinity (eV)	0.557	-
Ionization energy (eV)	8.337	6.108
Boiling point (K)	3236	3141
Melting point (K)	1828.05	1802
Density (g/cm³)	12	9.07
Atomic number	46	68
Group name	Transition metal	Lanthanide
Symbol	Pd	Er
Discovered (year)	1803	1843