Comparison of Platinum and Thorium

Attribute	Platinum ×	Thorium ×
Atomic mass (u)	195.08	232.038
Standard state	Solid	Solid
Oxidation states	+2 +4	+4
Electron configuration	[Xe]6s¹4f¹⁴5d⁹	[Rn]7s²6d²
Atomic radius (van der waals) (pm)	209	237
Electronegativity (pauling scale)	2.28	1.3
Electron affinity (eV)	2.128	-
Ionization energy (eV)	9	6.08
Boiling point (K)	4098	5061
Melting point (K)	2041.55	2023
Density (g/cm³)	21.46	11.72
Atomic number	78	90
Group name	Transition metal	Actinide
Symbol	Pt	Th
Discovered (year)	1735	1828