The Periodic Table/90 - Thorium (Th)

Element Thorium (Th, 90)

Here you can read more about the chemical element Thorium. Its shemical symbol is Th and its atomic number is 90. The relative atomic mass of Thorium is 232.03806 u. The elemental classification of Thorium is Actinides, and it belongs to group 3 and period 7 in the Periodic Table of Elements.

The density of Thorium is 11700 kg/m3. And the mineral hardness of Thorium is 3 Mohs. The melting point of Thorium is 2000 Kelvin (1727 ℃). The boiling point of Thorium is 4500 Kelvin (4227 ℃). Thorium was discovered in the year 1829 by Jöns Jakob Berzelius.

To the right (or below if you are using a mobile device with a smaller screen) you will find the information given above for the element Thorium ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.

Data about element Thorium

Chemical symbol
Element classification
Atomic number
Relativ atomic mass
Atomic mass
232.03806 u
11700 kg/m3
Melting point
2000 K   (1727 ℃)
Boiling point
4500 K   (4227 ℃)
Mineral hardness
3 Mohs
Discovered year
Discovered by
Jöns Jakob Berzelius