Comparison of Molybdenum and Osmium

Attribute	Osmium ×	Molybdenum ×
Atomic mass (u)	190.2	95.95
Standard state	Solid	Solid
Oxidation states	+3 +4	+6
Electron configuration	[Xe]6s²4f¹⁴5d⁶	[Kr]5s¹4d⁵
Atomic radius (van der waals) (pm)	216	209
Electronegativity (pauling scale)	2.2	2.16
Electron affinity (eV)	1.1	0.746
Ionization energy (eV)	8.7	7.092
Boiling point (K)	5285	4912
Melting point (K)	3306	2896
Density (g/cm³)	22.57	10.2
Atomic number	76	42
Group name	Transition metal	Transition metal
Discovered (year)	1803	1778
Symbol	Os	Mo