90
232.038 u
Th
Thorium
Actinide
Atomic Structure
Physical State
Group
N/A
Period
7
Block
f
Electron Configuration
[Rn] 6d² 7s²
Physical Properties
Atomic Mass:
232.038 u
Electronegativity:
1.3
Atomic Radius:
206 pm
Ionization Energy:
6.08 eV
Density:
11.724 g/cm³
Melting Point:
2115 K
Boiling Point:
5061 K
Historical Information
Discovered By:
Jöns Jakob Berzelius
Year Discovered:
1829