The Periodic Table/89 - Actinium (Ac)

Element Actinium (Ac, 89)

Here you can read more about the chemical element Actinium. Its shemical symbol is Ac and its atomic number is 89. The relative atomic mass of Actinium is 227 u. The elemental classification of Actinium is Actinides, and it belongs to group 3 and period 7 in the Periodic Table of Elements.

The density of Actinium is 10070 kg/m3. The melting point of Actinium is 1323 Kelvin (1050 ℃). The boiling point of Actinium is 3473 Kelvin (3200 ℃). Actinium was discovered in the year 1902 by Friedrich Oskar Giesel.

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 Actinium ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.

Data about element Actinium

Chemical symbol
Element classification
Atomic number
Relativ atomic mass
Atomic mass
227 u
10070 kg/m3
Melting point
1323 K   (1050 ℃)
Boiling point
3473 K   (3200 ℃)
Discovered year
Discovered by
Friedrich Oskar Giesel