Technical Data for the element Thorium in the Periodic Table

Name:

Thorium

Symbol:

Atomic Number:

Atomic Weight:

232.038(1)

Density:

11.72 g/cc

Melting Point:

1749.85 C

Boiling Point:

4786.85 C

Electron Configuration:

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶ 6d² 7s²

Chemical Group:

Rare Earth Metals

Detailed Technical Data

The data on this page is more precise and in some cases more up-to-date than the data engraved on the wooden tiles. But as always, never believe one source if the number really matters. Density, melting point and boiling point data is particularly variable and uncertain.

Atomic weight data for stable elements from IUPAC 1999 Official Publication. (Uncertainty in parentheses.)

Special notes for this element from IUPAC publication:
Geological specimens are known in which the element has an isotopic composition outside the limits for normal material. The difference between the atomic weight of the element in such specimens and that given in the Table may exceed the stated uncertainty.