This site offers comprehensive information for each element including: who, when up to 40 properties (chemical & physical); over 3, 600 nuclides (isotopes); over 4, 400 nuclide decay modes; the element names in 10 different languages; and more. In addition chemistry and technical terms are linked to their definitions in the site's chemistry and environmental dictionary.

Home About This Site Comments Help Links Window Version Show Table With: Name Atomic Number Atomic Mass Electron Configuration Number of Neutrons Melting Point Boiling Point Date of Discovery Crystal Structure Element Groups: Alkali Metals Alkaline Earth Metals Transition Metals Other Metals Metalloids Non-Metals Halogens Noble Gases Rare Earth Elements Basic Information | Atomic Structure | ...

The Element Actinium - Basic Physical and Historical Information ...

Discovered : 1899 by Andrew Debierne Isolated in Paris, France Origin : From the Greek aktino meaning ray. Description : A radioactive metal first extracted from natural uranium ores but now made from uranium in atomic reactors. It glows in the the dark because its intense radioactivity excites the surrounding air. Image : Alpha Rays. ...