Comparison of Nickel and Lutetium

Attribute	Lutetium ×	Nickel ×
Atomic mass (u)	174.9668	58.693
Standard state	Solid	Solid
Oxidation states	+3	+2 +3
Electron configuration	[Xe]6s²4f¹⁴5d¹	[Ar]4s²3d⁸
Atomic radius (van der waals) (pm)	221	163
Electronegativity (pauling scale)	1.27	1.91
Electron affinity (eV)	-	1.156
Ionization energy (eV)	5.426	7.64
Boiling point (K)	3675	3186
Melting point (K)	1936	1728
Density (g/cm³)	9.84	8.912
Atomic number	71	28
Group name	Lanthanide	Transition metal
Symbol	Lu	Ni
Discovered (year)	1907	1751