Elementymology & Elements Multidict by Peter van der Krogt
Protactinium
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Pa
91
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Elementymology & Elements Multidict by Peter van der Krogt
Protactinium
Pop-ups with explanatory texts appear by moving your mouse over tables, illustrations, links etc.
|
Pa
91
|
|
Multilingual dictionary
Indo-EuropeanLanguage key — Germanic Protactinium en de nl fy da no Protaktinium lb af sv fo Protaktín is — Italic Protactinium fr Protactinio es Protactínio pt Protactini ca oc Protactinio gl Protoattinio it Protoatini fur Protactiniu ro Protoactiniu mo Protactiniumu arm — Slavic Протактиний [protaktinij] ru bg Протактинiй [protaktynij] uk Пратактынiй [prataktynij] by Proaktyn pl Protaktin kas Protaktinium cs Protaktínium sk Protaktinij sl hr bos Протоактиниjум [protoaktinijum] sr Протактиниум [protaktinium] mk — Baltic Protaktinis lt Protaktīnijs lv Prātaktinis sud — Celtic Protoactiniwm cy Prótachtainiam ga Pròtactainiam gd Protaghtinnium gv Protoactynyum kw Protaktiniom br — Other Indo-European Πρωτακτινιο [prōtaktinio] el Protaktin sq Պրոտակտինիում [protaktinium] hy — Indo-Iranian Протактиний [protaktinij] oss Uralic Protaktinium fi Protaktiinium et Protaktínium hu Протактини [protaktini] mok Altaic Protaktinyum tr Протактиний [protaktinij] kk uz Protaktini' tg Протактини [protaktini] mn Other (Europe) Protaktinioa eu პროტაქტინიუმი [protak'tiniumi] ka East- & South-Asia プロトアクチニウム [purotoakuchiniumu] ja 鏷 [pu2 / pok8] zh (mand./cant.) 프로트악티늄 or 프로탁티늄 [peurotagtinyum] ko Protactini vi โพรแทกทิเนียม [phrōthaekthiniam] th Protaktinium ms புரொட்டக்டினியம் [puroţţakţiniyam] ta Afro-Asiatic بروتكتنيوم [brūtaktīniyūm] ar Protaktinjum mt פרוטקטיניום [protaktinium] he Africa Protaktini sw Artificial Protaktinio eo New names Proteon (PRT) aen Gohrjanium dms |
Appearance, some properties, a memory peg and a summary of discovery and etymology
History & Etymology
Element #91 was predicted by Д.И. Менделеев (D.I. Mendeleyev) in 1871 and named by him Eka-Tantalum (note) .
In 1918, two research scientist teams isolated almost simultaneously a more stable isotope (231Pa), of the decay series of 235U. These teams were led by Otto Hahn and Lise Meitner (note), and by Frederick Soddy and John A. Cranston (note). The first team named this isotope Protoactinium, from the Greek πρωτος [prōtos] = first, since its place in the uranium-actinium decay series it is the first before Actinium (it falls apart in Actinium (227Ac) and an α-particle).
Historical names of Protactinium Isotopes
John and Gordon Marks suggested in 1994 the name Meitnium (Mt), after Lise Meitner, according to them the discoverer of this element and of the many peculiar properties (especially radioactivity) of the actinides. The Marks brothers found the old names ugly and confusing. They offered alternative names that are equivalent contemporary (at the time and place of discovery) metaphors, both more euphonious and more memorable (note). Further reading:
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© Peter van der Krogt
The first isotope of Protactinium to be discovered was 234Pam (also called Uranium X2), an ephemerous member of the natural decay series of 238U. This isotope was identified by Kasimir Fajans (1887-1975) and Otto H. Göhring of Karlsruhe in 1913, who called it Brevium (= brief), because of its short half-life