Actinium: the essentials

Actinium is dangerously radioactive. The chemical behaviour of actinium is similar to that of the rare earths, particularly lanthanum. It is found naturally in uranium ores and actinium is 150 times more radioactive than radium.

Table: basic information about and classifications of actinium.

Actinium: historical information

Actinium was discovered by Andre Debierne at 1899 in France. Origin of name: from the Greek word "aktinos" meaning "ray".

Actinium was discovered by Andre Debierne in 1899 and independently by F. Giesel in 1902, both of whom obtained it while working on separation techniques for rare earth oxides.

Actinium: physical properties

 Read more » »

Actinium: orbital properties

 Read more » »

Isolation

Isolation: coming soon!

WebElements Shop

WebElements now has a WebElements shop at which you can buy periodic table posters, mugs, T-shirts, games, fridge magnets, molecular models, and more.

Periodic Table fridge magnets Periodic Table fridge magnets
Buy our periodic table fridge magnets here

WebElements poster Periodic table t-shirts Periodic table mouse mats Molymod molecular model kits Chemistry educational resources

actinium atomic number