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 …

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 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.

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

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

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].

Jan 21, 2025 · 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 chemical element 89 on the periodic table. Its symbol is Ac. Actinium's mass is 227 g/mol. Actinium is a silver radioactive, solid metal in actinide group. It is so radioactive that it glows in the dark. Even a small amount of actinium is dangerous to people.

Sep 16, 2013 · 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.

Explore the comprehensive guide on actinium, a radioactive element with crucial industrial and medical applications. Learn about its history, physical and chemical properties, uses in radiation therapy for cancer, safety precautions, and fascinating facts.