Meaning Of The Word Protactinium
What's the definition of Protactinium? Find Protactinium meanings, definitions and more at the Real Dictionary online.
Protactinium Meaning
| Protactinium Definition |
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What's The Definition Of Protactinium?
protactinium in American English
a rare, radioactive, metallic chemical element, one of the actinides, found in pitchblende: symbol, Pa; at. no., 91 noun: a radioactive, metallic element; at. no.: 91 protactinium in British English noun: a toxic radioactive metallic element that occurs in uranium ores and is produced by neutron irradiation of thorium. Symbol: Pa; atomic no: 91; half-life of the most stable isotope, 231Pa: 32 500 years; valency: 4 or 5; relative density: 15.37 (calc.); mel |
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