|Group||Actinides||Melting point||1050°C, 1922°F, 1323 K|
|Period||7||Boiling point||3200°C, 5792°F, 3473 K|
|Block||d||Density (g cm−3)||Unknown|
|Atomic number||89||Relative atomic mass|||
|State at 20°C||Solid||Key isotopes||227Ac|
|Electron configuration||[Rn] 6d17s2||CAS number||7440-34-8|
|ChemSpider ID||22404||ChemSpider is a free chemical structure database|
- Actinium is a radioactive element with an atomic number 89 of the periodic table that has the physical appearance of metallic silver.
- In nature, it is found in traces of most of the Uranium ores.
- Due to intense radioactivity, this metal glows blue in the dark.
- It also shares similar properties to that of lanthanum.
- Actinium does not find much significant use in any industrial application.
- It is a vital source of alpha rays.
- Actinium-225 is used in the field of medicine as an agent for radiation therapy.
- It has immense value as a neutron source as it is one fifty times more radioactive than compared to radium.
- This radioactive element reacts with oxygen to form a white coating like substance called actinium oxide. Thus preventing the metal from further getting oxidized.
- The actinium ions appear colorless when kept in a solution. It is one among the strongest of radioactive elements.