Elementymology & Elements Multidict by Peter van der Krogt
Actinium
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Ac
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Elementymology & Elements Multidict by Peter van der Krogt
Actinium
Pop-ups with explanatory texts appear by moving your mouse over tables, illustrations, links etc.
|
Ac
89
|
|
Multilingual dictionary
Indo-EuropeanLanguage key — Germanic Actinium en da nl fy no fo Aktinium af de lb sv Aktín is — Italic Actinium fr Actinio es gl Actínio pt Actini ca oc Attinio it Atini fur Actiniu ro Actiniumu arm — Slavic Актиний [aktinij] ru bg Актинiй [aktynij] uk Актынiй [aktynij] by Aktyn pl Aktin kas Actinium cs Aktinij sl hr bos Aktínium sk Актиниjум [aktinijum] sr Актиниум [aktinium] mk — Baltic Aktinis lt Aktīnijs lv Aktinijan sud — Celtic Actiniwm cy Achtainiam ga Aictiniam gd Aghtinnium gv Actynyum kw Aktiniom br — Other Indo-European Ακτινιο [aktinio] el Aktin sq Ակտինիում [aktinium] hy — Indo-Iranian Актиний [aktinij] oss Uralic Aktinium fi Aktiinium et Aktínium hu Актини [aktini] mok Altaic Aktinyum tr Актиний [aktinij] kk uz Aktini' tg Актини [aktini] mn Other (Europe) Aktinioa eu აქტინიუმი [ak'tiniumi] ka East- & South-Asia アクチニウム [akuchiniumu] ja 錒 [ei1 / a1] zh (mand./cant.) 악티늄 [agtinyum] ko Actini vi แอกทิเนียม [aekthiniam] th Aktinium ms அக்டினியம் [akţiniyam] ta Afro-Asiatic اكتنيوم [aktīniyūm] ar Aktinjum mt אקטיניום [aktinium] he Africa Aktini sw Artificial Aktinio eo New names Actinion (ACT) aen Uselessium dms |
Appearance, some properties, a memory peg and a summary of discovery and etymology
History & Etymology
Actinium is a rare, extremely radioactive metal that glows in the dark with an eerie blue light. It was discovered twice. In 1899 André-Louis Debierne (1874-1949) found a radioactive substance which was separated from pitchblende with the rare earths and had chemical properties similar to those of Thorium. In 1900 he proposed the name Actinium, derived from Greek ακτις [aktis] = ray, sun beam (note).
Three years later, in 1902, Fritz Giesel (1852-1927) noted the presence of a new radioactive substance which was usually separated with Lanthanum and Cerium from the minerals. It possessed the property of giving out a radioactive emanation or gas, the activity of which died away in a few seconds. For this reason he called it the "emanating substance" and afterwards Emanium (note). Later was showed that it was identical with Actinium, and since Debierne was earlier, his chosen name took priority. The genetic relationships of the members of the Actinium decay series were determined during the next twenty years by radiochemical studies. The parent of the series, 235U, and the mass numbers of all its members were established by Arthur Dempster (1886-1950) in 1935, by mass spectrometric analysis.
Historical names of Actinium isotopes
Actinium in 1881 In 1881 Phipson named a metal Actinium. He thought that this metal accompanied Zinc. Further reading:
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© Peter van der Krogt
