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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
  • 프로트악티늄 - 나무위키
    P rot a ctinium 악티늄족 원소 의 일종으로, 원자번호 91 번 발음이 [proʊtækˈtɪni
  • Protactinium - Element information, properties and uses | Periodic Table
    Element Protactinium (Pa), Group 20, Atomic Number 91, f-block, Mass 231 036 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • 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
  • Periodic Table of Elements: Los Alamos National Laboratory
    Protactinium is one of the rarest and most expensive naturally occurring elements The average concentrations of protactinium in the Earth's crust is typically on the order of a few parts per trillion, but may reach up to a few parts per million in some uraninite ore deposits
  • 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
  • Protactinium | Pa | CID 23945 - PubChem
    Protactinium | Pa | CID 23945 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety hazards toxicity information, supplier lists, and more
  • Protactinium | XPS Periodic Table | Thermo Fisher Scientific - KR
    The element was isolated for the fist time in 1934 by A V Grosse In 1961, the United Kingdom Atomic Energy Authority was able to produce 125 grams of 99 9 percent pure protactinium which processes about sixty tons of waste material – a supply of the element that would last for many years to come
  • 프로트악티늄 (protactinium)특성,용도,환경적 영향,응용 분야 산업
    오늘은 여러분의 과학적 지식을 넓히기 위해 흥미로운 원소, 바로 '프로트악티늄 (Protactinium)'에 대해 이야기하려 합니다 프로트악티늄은 원소 기호 'Pa'와 원자 번호 91을 가진 희귀하고 방사성이 강한 원소입니다
  • 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





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