錒 ā （英語： Actinium），是一種 化學元素，其 化學符號 为 Ac， 原子序數 为89，位居 錒系元素 之首。 在 元素週期表 中，錒系元素始於錒，止於 鐒，一共有15種元素。 錒是一種柔軟的銀 …

锕（Actinium），一种天然放射性元素，化学符号Ac，原子序数89，原子相对质量227.0278，属锕系元素，为银白色金属。其英文名来源于希腊文aktis（射线）。1899年法国的A.L.德比埃尔内 …

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 …

Actinium is a soft, silvery-white radioactive metal. It glows blue in the dark because its intense radioactivity excites the air around it. Actinium is a very powerful source of alpha rays, but is …

Actinium is a rare element that is present in uranium ores in tiny amounts, but it is usually cheaper and easier to create actinium when it is needed by bombarding radium with neutrons in a …

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 …

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 …

2021年10月14日 · Actinium atom is a scandium group element atom, an actinoid atom and a f-block element atom. Actinium has been investigated for the treatment of Breast Cancer and …

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 …

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 …