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protactinium    
n. 镤

镤

protactinium
n 1: a short-lived radioactive metallic element formed from
uranium and disintegrating into actinium and then into lead
[synonym: {protactinium}, {protoactinium}, {Pa}, {atomic number
91}]

Protactinium \Protactinium\
The radioactive chemical element, of atomic number 91; Atomic
symbol Pa; at. wt. of longest-lived isotope, 231 (T1/2 =
32,500 yrs.) Also called brevium, Uranium X2 and UX2.
[PJC]


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  • Protactinium - Wikipedia
    Protactinium is a chemical element; it has symbol Pa and atomic number 91 It is a dense, radioactive, silvery-gray actinide metal which readily reacts with oxygen, water vapor, and inorganic acids
  • Protactinium | History, Uses, Facts, Physical Chemical Characteristics
    Predicted by Dimitri Mandeleev in 1871, protactinium was first identified in 1913 by Kasimir Fajans and Oswald Helmuth Gohring It is highly radioactive, scarce and toxic element and has no uses outside scientific research
  • Protactinium Facts - Symbol Pa or Atomic Number 91
    Protactinium (Pa) is a rare, radioactive metal with atomic number 91 and a silvery-gray appearance It belongs to the actinide series and occurs naturally in trace amounts in uranium ores as part of the uranium-235 decay chain
  • Protactinium - Element information, properties and uses | Periodic Table
    Small amounts of protactinium are found naturally in uranium ores It is also found in spent fuel rods from nuclear reactors, from which it is extracted Mendeleev said there should be an element between thorium and uranium, but it evaded detection
  • Protactinium | Radioactive, Decay, Isotopes | Britannica
    Protactinium (Pa), radioactive chemical element of the actinoid series of the periodic table, rarer than radium; its atomic number is 91 It occurs in all uranium ores to the extent of 0 34 part per million of uranium Its existence was predicted by Russian chemist Dmitry Mendeleyev in his 1871
  • Protactinium Facts, Symbol, Discovery, Properties, Uses
    Protactinium is a highly radioactive metal belonging to the family of actinides and denoted by the chemical symbol Pa [1] It has 27 isotopes with mass numbers ranging from 212 to 238 out of which protactinium-231 is the most stable one with a half-life of 3 276 x 10 4 years
  • Protactinium: Element 91 - Uses, Properties, and Facts
    Explore the intriguing world of Protactinium, Element 91 Learn about its history, properties, uses, and why it’s a fascinating subject in scientific research From its discovery to its chemical reactions and potential applications, delve deep into this rare and radioactive element
  • Protactinium | Pa (Element) - PubChem
    Protactinium was first isolated by Aristid V Grosse in 1934 Protactinium is a rare, poisonous and expensive element that is present in uranium ores in very small amounts
  • Protactinium: Element Properties and Uses - samaterials. com
    Protactinium is a rare radioactive actinide element exhibiting unique chemical and physical properties, fueling scientific research and specialized industrial applications globally
  • Protactinium Element Facts
    Protactinium is a very rare shiny, silvery, highly radioactive metal that tarnishes slowly in air to the oxide Almost all naturally occurring protactinium is the 231 isotope





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