Thorium

Atomic symbol: Th
Atomic number: 90
Atomic mass: 232.04

Appearance: Dark silver solid, often with a brown hue, at 25°C

Group: N/a Period: 7
Series: Actinides
Block: f
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶ 6d² 7s²

Radioactive metal.

Uses in nuclear fuel rods.

Fun Fact! Thorium has a liquid range of over 3000 degrees, the largest of any element!