- protoactinium
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/proh'toh ak tin"ee euhm/, n. Chem.protactinium.
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Universalium. 2010.
protoactinium
Look at other dictionaries:
protoactinium — [prōt΄ō ak tin′ē əm] n. former name for PROTACTINIUM … English World dictionary
protoactinium — noun a short lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead • Syn: ↑protactinium, ↑Pa, ↑atomic number 91 • Hypernyms: ↑metallic element, ↑metal * * * variant of p … Useful english dictionary
protoactinium — SYN: protactinium. * * * protoactinium var of PROTACTINIUM … Medical dictionary
protoactinium — n. radioactive metallic element … English contemporary dictionary
protoactinium — /ˌproʊtoʊækˈtɪniəm/ (say .prohtohak tineeuhm) noun Obsolete → protactinium …
Protactinium — Eigenschaften … Deutsch Wikipedia
Protactinium — thorium ← protactinium → uranium Pr ↑ Pa ↓ … Wikipedia
protactinium — /proh tak tin ee euhm/, n. Chem. a radioactive, metallic element. Symbol: Pa; at. no.: 91. Also, protoactinium. [1915 20; PROT + ACTINIUM] * * * ▪ chemical element (Pa), radioactive chemical element of the actinoid series of the periodic… … Universalium
Decay chain — In nuclear science, the decay chain refers to the radioactive decay of different discrete radioactive decay products as a chained series of transformations. Most radioactive elements do not decay directly to a stable state, but rather undergo a… … Wikipedia
Isotopes of protactinium — Protactinium (Pa) Standard atomic mass: 231.03588(2) u The element has no stable isotopes. However, it has a characteristic terrestrial isotopic composition and thus an atomic mass can be given.Isotopes of protactinium occurring within the… … Wikipedia
