Actinium is a chemical element; it has symbol Ac and atomic number 89. It was discovered by Friedrich Oskar Giesel in 1902, who gave it the name emanium; the element got its name by being wrongly identified with a substance André-Louis Debierne found in …

2025年1月21日 · Actinium is a soft, silvery-white radioactive metallic element that showcases unique properties and specialized applications, with the atomic number 89. Actinium is known for its strong radioactivity, making it stand out among elements.

Actinium is a radioactive metal. It is the third element in row 7 of the periodic table. It is considered often as the first of the actinides, a group of “inner transition metals”. Quite recently discovered, it has been a useful metal in laboratory research over the past century.

Element Actinium (Ac), Group 20, Atomic Number 89, d-block, Mass [227]. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Actinium, the ions of which in solution are colourless, exhibits an oxidation state of +3, closely resembling the rare-earth lanthanoid elements in its chemical properties. Actinium is the prototype of a second rare-earth-like series, the actinoid elements.

Actinium. Actinium is a chemical element with symbol Ac and atomic number 89. Classified as an actinide, Actinium is a solid at room temperature.

What is Actinium. A radioactive metal, actinium (pronounced as ak-TIN-ee-em) belongs to the family of actinide metals and denoted by the chemical symbol Ac [1].

2013年9月16日 · Actinium is the first of the actinide series of elements. The chemical behavior of actinium is similar to rare earths, especially lanthanum. Actinium is about 150 times as active as radium.

Actinium is radioactive; it glows in the dark. Actinium is used as a source of neutrons. Abundance Earth’s Crust: 0.0005 parts per trillion by weight. Abundance Solar System: negligible. Cost, pure: $ per 100g. Cost, bulk: $ per 100g. Source: Natural U-235 radioactive decay. A ton of pitcheblende contains about 0.15 milligrams of actinium.

2019年12月5日 · Actinium is the radioactive element that has atomic number 89 and element symbol Ac. It was the first non-primordial radioactive element to be isolated, although other radioactive elements had been observed before actinium. This element possesses several unusual and interesting characteristics. Here are the properties, uses, and sources of Ac.