protoactinium

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protoactinium

(ˌprəʊtəʊækˈtɪnɪəm)

(Elements & Compounds) the former name of protactinium

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Noun

protoactinium - a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

atomic number 91, protactinium, Pa

metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

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References in periodicals archive ?

Furthermore, he reveals singular ignorance in that he does not appear to know that the two daughter isotopes of U-238, namely Protoactinium 234m and Thorium 234, which are both high energy beta emitters, are in equilibrium in all U-238 material.

Depleted uranium and human health: another view: Robert Green responds on behalf of the DU Education Team and the National Consultative Committee on Disarmament to suggestions that depleted uranium poses relatively few health problems

In a unique instance of double embedment, there is acTINium and protoACTINIUM. Several pairs of chemical element names are mutual substitute-letter transpositions:

Kickshaws

Newspapers, magazines, news services and radio broadcasters were soon ordered not to mention atomic power, cyclotrons, betatrons, fission, uranium, deuterium, protoactinium and thorium.