Comparison of Scandium and Chromium

Attribute	Chromium ×	Scandium ×
Atomic mass (u)	51.996	44.95591
Standard state	Solid	Solid
Oxidation states	+2 +3 +6	+3
Electron configuration	[Ar]3d⁵4s¹	[Ar]4s²3d¹
Atomic radius (van der waals) (pm)	189	211
Electronegativity (pauling scale)	1.66	1.36
Electron affinity (eV)	0.666	0.188
Ionization energy (eV)	6.767	6.561
Boiling point (K)	2944	3109
Melting point (K)	2180	1814
Density (g/cm³)	7.15	2.99
Atomic number	24	21
Group name	Transition metal	Transition metal
Discovered (year)	1797	1879
Symbol	Cr	Sc