Comparison of Boron and Ruthenium

Attribute	Ruthenium ×	Boron ×
Atomic mass (u)	101.1	10.81
Standard state	Solid	Solid
Oxidation states	+3	+3
Electron configuration	[Kr]5s¹4d⁷	[He]2s²2p¹
Atomic radius (van der waals) (pm)	207	192
Electronegativity (pauling scale)	2.2	2.04
Electron affinity (eV)	1.05	0.277
Ionization energy (eV)	7.361	8.298
Boiling point (K)	4423	4273
Melting point (K)	2607	2348
Density (g/cm³)	12.1	2.37
Atomic number	44	5
Group name	Transition metal	Metalloid
Discovered (year)	1827	1808
Symbol	Ru	B