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A GU1A W. Close mobile search navigation Article Navigation. Tanner, Phil, Mag. Actinium also has two known meta states. You are viewing page 1. Robinson, Bull. Bennett, Bull. Lindsay-Jones, A. Schrank, Phys.
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Ferrell and W. Bleuler and D. Moyer and H. Density was not measured directly but calculated from the lattice parameters. NuDat at BNL. Cooper and Dan J.
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- It was the first non-primordial radioactive element to be isolated.
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锕是一种放射性化学元素，符号为Ac，原子序为89。锕在年被发现，是首个得到分离的非原始核素（non-primordial radioactive. 锕是一种放射性化学元素，符号为Ac，原子序为89。 锕在年被发现，是首个得到分离的非原始核素（ non-primordial radioactive element ）。 虽然钋、镭和氡比锕更早被发现，但是科学家到年才分离出这些元素。 在元素周期表中，锕系元素始于锕，止于铹，一共有15种元素。. Actinium is a chemical element with symbol Ac and atomic number Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic rennatatropeano.com is also sometimes considered the first of the 7th-period transition metals, although lawrencium is less commonly given that rennatatropeano.comered in , it was the first non-primordial.
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Fowler, C. Issue Section:. Energy 4 FR27 J. Ferguson, Phys. Dickson and D. Manning and J. Kliger, V. Craig, W. Elkind, Phys. Yntema, Bull. Nishimura, Nucl. Dodge and V. Bleuler and D.
Friedrich Oskar Giesel later independently isolated it in and, unaware that it was already known, gave it the name emanium. It is also sometimes considered the first of the 7th-period transition metals , although lawrencium is less commonly given that position.
Actinium Element General properties. Name, symbol. Actinium in the periodic table.