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 - Element information, properties and uses | Periodic …
网页Element Actinium (Ac), Group 20, Atomic Number 89, d-block, Mass [227]. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Actinium - NIST Chemistry WebBook
网页Molecular weight: 227. IUPAC Standard InChI: InChI=1S/Ac. IUPAC Standard InChIKey: QQINRWTZWGJFDB-UHFFFAOYSA-N. CAS Registry Number: 7440-34-8. Chemical structure: This structure is also available as a 2d Mol file. Permanent link for this species. Use this link for bookmarking this species for future reference. Information on this page:
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.
WebElements Periodic Table » Actinium » the essentials
网页Actinium atoms have 89 electrons and the shell structure is 2.8.18.32.18.9.2. The ground state electronic configuration of neutral actinium is [ Rn ]. 6d 1 . 7s 2 and the term symbol of actinium is 2 D 3/2 .
Actinium (Ac) - Periodic Table
网页Actinium is the 89th element in the periodic table and has a symbol of Ac and atomic number of 89. It has an atomic weight of (227) and a mass number of 205. Actinium has eighty-nine protons and one hundred sixteen neutrons in its nucleus, and eighty-nine electrons in seven shells. It is located in group three, period seven and block d of the ...
Actinium - 89 Ac: properties of free atoms - WebElements
网页2018年8月2日 · Actinium atoms have 89 electrons and the shell structure is 2.8.18.32.18.9.2. The ground state electron configuration of ground state gaseous neutral actinium is [Rn].6d 1.7s 2 and the term symbol is 2 D 3/2.
Actinium (Ac) - Periodic Table
网页Actinium is a chemical element of the periodic table with chemical symbol Ac and atomic number 89 with an atomic weight of 227 u and is classed as actinide and is part of group 3 (scandium group). Actinium is solid at room temperature.
C&EN: IT'S ELEMENTAL: THE PERIODIC TABLE - ACTINIUM
网页Actinium is a silvery white metal having a face-centered cubic crystal structure. It has an electronic configuration of [Rn] 6d 1 7s 2, a melting point of 1,320 K, a boiling point of 3,470 K, electronegativity of 1.1 (Pauling), and a thermal conductivity of 12 W -1 K -1 at 300 K.
Actinium - EniG. Periodic Table of the Elements
网页90 Thorium. Physical and chemical properties of Actinium: general data, thermal properties, ionization energies, isotopes, reduction potentials, abundance of elements, crystallographic data.
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