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protactinium
Periodic Table of the Elements: Protactinium
Periodic Table of the Elements: Protactinium
| Periodic Table of the Elements: Protactinium |
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| Atomic Number:
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91
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| Atomic Symbol:
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Pa
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Protactinium
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| Atomic Weight:
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231.0359
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| Electron
Configuration:
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2 · 8 · 18
32 · 20
9 · 2
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Cite this article
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Debate smolders over cause of ice ages. (R. Lawrence Edwards used protactinium dating to support the orbital theory of ice age development)(Earth Science)(Brief Article)
Magazine article from: Science News; 5/24/1997; ; 700+ words
; ...cold reception from Isaac J. Winograd, a researcher at the U.S. Geological Survey in Reston, Va. Winograd lauds the protactinium, dating technique but objects that the new study reanalyzed coral samples already known to support the orbital hypothesis...
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Fine-Tuning the Steps in the Intricate Climate Change Dance.
News Wire article from: Ascribe Higher Education News Service; 12/7/2005; 700+ words
; ...two naturally occurring isotopes, protactinium and thorium, she compared the temperature...the east coast of the United States. Protactinium and thorium are daughter isotopes of...ocean floor, while some percentage of protactinium will be exported out of the North Atlantic...
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Rate of Ocean Circulation Directly Linked to Abrupt Climate Change in North Atlantic Region.
News Wire article from: Ascribe Higher Education News Service; 4/22/2004; 700+ words
; ...ocean circulation. The isotopes, protactinium and thorium, are produced at constant...floor below where it was produced. Protactinium is removed less readily and thus remains...years. As a result, about half of the protactinium produced in North Atlantic water today...
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A chemical glance at short-lived elements.
Magazine article from: Science News; 9/8/1990; ; 700+ words
; ...chemical properties resembling those of protactinium, a naturally occuring element situated...in the so-called actinide series. Protactinium is a dangerous, highly toxic material...seems to put the element nearer to the protactinium camp than the tantalum group. The...
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JOHN GOFMAN DEAD AT 88; CONSIDERED FATHER OF ANTINUCLEAR MOVEMENT
Magazine article from: Rachel's Democracy & Health News; 8/30/2007; ; 700+ words
; ...Berkeley cyclotron and proved that it would fission spontaneously. He was also the codiscoverer of protactinium-232, uranium-232, and protactinium-233 during his graduate student years. In 1942, physicist J. Robert Oppenheimer, who headed...
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HOW THE ATOM WORKS
Newspaper article from: The Independent - London; 3/10/1996; 700+ words
; ...One of its neutrons turns into a proton and it becomes protactinium-234, with 91 protons and 143 neutrons. One of the orbiting...partner as the proton changes its form, and so breaks away. Protactinium-234 is itself extremely unstable and loses no time in changing...
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Radioactive ammo lays them to waste. (radioactive warfare)
Magazine article from: Multinational Monitor; 1/1/1996; ; 700+ words
; ...least 4.5 billion years. Even when U-238 does decay, it turns first into thorium-234 and then into protactinium-234. Protactinium-234 releases highly potent beta particles that may lead to cancerous growth in body cells. The U.S...
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Commentary: List of elements set to "I am a Very Model of a Modern Major General"
Transcript from: NPR All Things Considered; 8/24/2000; 371 words
; ...uranium, europium, zirconium, lutetium, vanadium, and lanthanum, and osmium, and astatine, and radium, and gold, and protactinium, and indium, and gallium, and iodine, and thorium, and thulium, and thallium. There's yttrium, ytterbium, actinium...
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Research from A. Morgenstern and co-researchers provides new data on drug development.
Newspaper article from: Cancer Weekly; 12/30/2008; 700+ words
; ...relevant amounts. A highly effective separation process was developed to isolate clinical grade U-230 from irradiated protactinium oxide targets, wrote A. Morgenstern and colleagues (see also Drug Development). The researchers concluded: Product...
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SDS Volume 84: Solubility of Inorganic Actinide Compounds.(Solubility Data Series)
Magazine article from: Chemistry International; 11/1/2008; 437 words
; ...and plutonium compounds. Fewer data have been published for americium compounds and very few for compounds of actinium, protactinium, and trans-americium elements. The literature has been covered up to the end of 2004. Documents that remained unavailable...
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Protactinium (revised)
Book article from: Chemical Elements: From Carbon to Krypton
PROTACTINIUM (REVISED) Note: This article, originally...2006 for the eBook edition. Overview Protactinium is one of the rarest elements on Earth...For many years, the only supply of protactinium of any size was kept in Great Britain...
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protactinium
Book article from: The Columbia Encyclopedia, Sixth Edition
protactinium , radioactive chemical element; symbol...calculated); valence +4, +5. Protactinium is a malleable, shiny silver-gray...and a pentoxide (Pa 2 O 5 ). Protactinium has 24 isotopes of which only three...
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Protactinium
Book article from: Chemistry: Foundations and Applications
Protactinium melting point: 1,568 ° C...4+ , PaO(OH)2 + An isotope of protactinium (having mass number 234 and a half...meaning brief. The existence of protactinium was confirmed in 1918 when another...
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Periodic Table of the Elements: Protactinium
Book article from: The Columbia Encyclopedia, Sixth Edition
Periodic Table of the Elements: Protactinium Periodic Table of the Elements: Protactinium Atomic Number: 91 Atomic Symbol: Pa Protactinium Atomic Weight: 231.0359 Electron Configuration: 2 · 8&thinsp...
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Actinides
Encyclopedia entry from: The Gale Encyclopedia of Science
...members are: actinium, thorium, protactinium, uranium, neptunium, plutonium...atomic symbol, Ac), thorium (Th), protactinium (Pa), and uranium (U) are extracted...Africa, and Namibia, thorium and protactinium are available in large quantities...
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