โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Actinium
  • ๐Ÿ‡จ๐Ÿ‡ณ ้Œ’
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Actinium
  • ๐Ÿ‡ซ๐Ÿ‡ท Actinium
  • ๐Ÿ‡ฉ๐Ÿ‡ช Actinium
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ืืงื˜ื™ื ื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Attinio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใ‚ขใ‚ฏใƒใƒ‹ใ‚ฆใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Actínio
  • ๐Ÿ‡ท๐Ÿ‡บ ะะบั‚ะธะฝะธะน
  • ๐Ÿ‡ช๐Ÿ‡ธ Actinio
  • ๐Ÿ‡ธ๐Ÿ‡ช Aktinium

Actinium: the essentials

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].6d1.7s2 and the term symbol of actinium is 2D3/2.

Actinium: description  

Actinium is dangerously radioactive. The chemical behaviour of actinium is similar to that of the rare earths, particularly lanthanum. It is found naturally in uranium ores and actinium is 150 times more radioactive than radium.

actinium
This sample of uraninite contains some about 10-9 grammes of actinium at any one time. Image adapted with permission from Prof James Marshall's (U. North Texas, USA) Walking Tour of the elements CD.

Actinium: physical properties

More physical properties...

Actinium: heat properties

More thermochemical properties...

Actinium: atom sizes

More atomc size properties...

Actinium: electronegativities

More electronegativity properties...

Actinium: orbital properties

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Actinium: abundances

More geological data...

Actinium: crystal structure

Ac crystal structure
The solid state structure of actinium is: bcc (body-centred cubic).

More crystallographic data...

Actinium: biological data

Actinium has no biological role.

More biological data...

Actinium: uses

Uses...

Actinium: reactions

Reactions of actinium as the element with air, water, halogens, acids, and bases where known.

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Actinium: binary compounds

Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of actinium where known.

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Actinium: compound properties

Bond strengths; lattice energies of actinium halides, hydrides, oxides (where known); and reduction potentials where known.

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Actinium: history

Actinium was discovered by Andre Debierne in 1899 at France. Origin of name: from the Greek word "aktinos" meaning "ray".

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Actinium: isotopes

Isotope abundances of actinium
Isotope abundances of actinium with the most intense signal set to 100%.

More isotope and NMR data...

Actinium: isolation

Isolation: coming soon!