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actinium    
n. 锕

锕

actinium
n 1: a radioactive element of the actinide series; found in
uranium ores [synonym: {actinium}, {Ac}, {atomic number 89}]

Actinium \Ac*tin"i*um\, n. [Gr. ?, ?, ray.] (Chem.)
A supposed metal, said by Phipson to be contained in
commercial zinc; -- so called because certain of its
compounds are darkened by exposure to light.
[1913 Webster]


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  • Actinium - Wikipedia
    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 1899 and called actinium
  • Actinium | Radioactive, Decay, Alpha Particles | Britannica
    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 | History, Uses, Facts, Physical Chemical . . .
    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 - Element information, properties and uses . . .
    Actinium is a very powerful source of alpha rays, but is rarely used outside research Actinium has no known biological role It is toxic due to its radioactivity Actinium used for research purposes is made by the neutron bombardment of radium-226 Actinium also occurs naturally in uranium ores
  • Actinium Facts, Symbol, Discovery, Properties, Uses
    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]
  • Actinium (Ac) - Definition, Preparation, Properties, Uses . . .
    What is Actinium? 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
  • 125 Years After Its Discovery, Actinium’s Chemistry Still . . .
    A study at Berkeley Lab has revealed new insights into actinium, an element critical for emerging cancer treatments By examining its crystal structure, researchers have noted unique properties that could enhance targeted alpha therapy, a promising method in cancer treatment





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