protoactinium

protoactinium
/proh'toh ak tin"ee euhm/, n. Chem.
protactinium.

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Universalium. 2010.

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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

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