Comparison of Beryllium and Scandium

Attribute	Scandium ×	Beryllium ×
Standard state	Solid	Solid
Electron affinity (eV)	0.188	-
Electron configuration	[Ar]4s²3d¹	[He]2s²
Atomic mass (u)	44.95591	9.012183
Electronegativity (pauling scale)	1.36	1.57
Oxidation states	+3	+2
Ionization energy (eV)	6.561	9.323
Atomic radius (van der waals) (pm)	211	153
Boiling point (K)	3109	2744
Melting point (K)	1814	1560
Density (g/cm³)	2.99	1.85
Atomic number	21	4
Group name	Transition metal	Alkaline earth metal
Discovered (year)	1879	1798
Symbol	Sc	Be