Th

Thorium

Z 90 232.038 g/molActinide Radioactive

Overview Atomic Properties Thermodynamics Electromagnetism Isotopes

Group

3

Period

7

Block

f

Occurrence

Primordial

Biological Role

---

History

1829 (discovery)

Jöns Jacob Berzelius

1914 (isolation)

Dirk Lely Jr., Lodewijk Hamburger

Named By

Jöns Jacob Berzelius

Latin Name

Thorium

Abundance

Universe

x

Sun

x

Meteorites

x

Earth's crust

x

Oceans

x

Humans

x