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Bookmark or Share- WebElements Periodic Table » Actinium » the essentialsAtomic number: 89. Relative atomic mass ( Ar): [ 227 ] (longest lived isotope) Standard state: solid at 298 K. Appearance: silvery. Classification: Metallic. Group in periodic table: Group name: Actinoid. Period in periodic table: 7 (actinoid) Block in periodic table: f. Shell structure: 2.8.18.32.18.9.2. CAS Registry: 7440-34-8.
- Actinium - WikipediaActinium is a chemical element; it has symbol Ac and atomic number 89. It was first isolated 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 1899 and called actinium.
- The Journey of Actinium-225: How Scientists Discovered a New Way to ...Although research into promising cancer treatments using actinium-225 started with a rare and limited source, DOE scientists have found a new way to The Journey of Actinium-225: How Scientists Discovered a New Way to Produce a Rare Medical Radioisotope | Department of Energy
- Actinium | Ac (Element) - PubChemActinium is a chemical element with symbol Ac and atomic number 89. Classified as a n actinide, Actinium is a solid at room temperature. 89. Actinium. View All Properties. He. Li. Be. C. N. O. F. Ne. Na. Mg. Al. Si. P. S. Cl. Ar. K. Ca. Sc. Ti. V. Cr. Mn. Fe. Co. Ni. Cu. Zn. Ga. Ge. As. Se. Br.
- Actinium | History, Uses, Facts, Physical & Chemical CharacteristicsActinium 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.
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