Comparison of Tungsten and Iridium

Attribute	Iridium ×	Tungsten ×
Atomic mass (u)	192.22	183.84
Standard state	Solid	Solid
Oxidation states	+3 +4	+6
Electron configuration	[Xe]6s²4f¹⁴5d⁷	[Xe]6s²4f¹⁴5d⁴
Atomic radius (van der waals) (pm)	202	210
Electronegativity (pauling scale)	2.2	2.36
Electron affinity (eV)	1.565	0.815
Ionization energy (eV)	9.1	7.98
Boiling point (K)	4701	5828
Melting point (K)	2719	3695
Density (g/cm³)	22.42	19.3
Atomic number	77	74
Group name	Transition metal	Transition metal
Discovered (year)	1803	1783
Symbol	Ir	W