Actinium - Wikipedia
网页Actinium 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 …
Actinium | Radioactive, Decay, Alpha Particles | Britannica
网页actinium (Ac), radioactive chemical element, in Group 3 (IIIb) of the periodic table, atomic number 89. Actinium was discovered (1899) by French chemist André-Louis Debierne in pitchblende residues left after French physicists Pierre and Marie Curie had extracted radium from them, and it was also discovered (1902) independently by German ...
Actinium - Element information, properties and uses | Periodic …
网页Actinium gives its name to a block of fifteen elements that lie between actinium and lawrencium in the periodic table with atomic numbers 89 through 103. These actinides - or actinoides as they are more correctly known these days - gain their name from the first element in the series, actinium, itself named after the Greek word for ray thus ...
Actinium | History, Uses, Facts, Physical & Chemical Characteristics
网页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.
Ultimate Guide To Actinium: Everything You Need To Know
网页2023年9月9日 · Facts. Ultimate Guide To Actinium: Everything You Need To Know. Actinium is a rare, radioactive chemical element from the actinide series of the periodic table. It is a silver-colored metal that is highly reactive and short-lived.
Facts About Actinium - Live Science
网页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 Facts - Element 89 or Ac - ThoughtCo
网页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.
Actinium - an overview | ScienceDirect Topics
网页Actinium is a radioactive element with the symbol Ac and atomic number of 89. It was discovered in 1899 by Andre Debeime, a French chemist. It was the first nonprimordial radioactive element to be isolated. Po, Ra and radon were observed before actinium, but they were not isolated until 1902.
WebElements Periodic Table » Actinium » the essentials
网页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 atoms have 89 electrons and the shell structure is 2.8.18.32.18.9.2.
Actinium (Ac) - Symbol, Molecular mass, Electronic configuration ...
网页Actinium is a radioactive element with an atomic number 89 of the periodic table. It has the physical appearance of metallic silver. In nature, it is found in traces of most of the Uranium ores. Due to intense radioactivity, this metal glows blue in the dark.