what is protactinium

Currently, protactinium is usually extracted from used nuclear fuel. In solution the +5 state, it rapidly hydrolyzes by combining with hydroxide ions to form soluble or insoluble hydroxy-oxide solids. In 1949, the name protoactinium was shortened to protactinium. The element has atomic number 91 and element symbol Pa. Like most elements on the periodic table, protactinium is a silver-colored metal. Protactinium is an alpha emitter (5.0 MeV) and is a radiological hazard which requires special handling. Sources: The element occurs in pitchblende to the extent of about 1 part Pa-231 to 10 million parts ore. Protactinium is a highly radioactive and highly toxic element with yet no commercial applications but nevertheless of some scientific interest. Protactinium (Pa), radioactive chemical element of the actinoid series of the periodic table, rarer than radium; its atomic number is 91. Nearly all uranium-238 (99.8 percent) decays first to the 234mPa isomer and then to 234Pa.

The element is superconductive below 1.4K.

Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work. Pa-234 is a short-lived member of the naturally occurring U-238 decay series. Mary has a liberal arts degree from Goddard College and When in compound form, protactinium is most stable in oxidation state +5, though it also exists in +4, +3 and +2 oxidation states. In general, Pa only occurs at a concentration of a few parts per trillion in the Earth's crust. Protactinium metal is a shiny, radioactive and silvery metal that degrades slowly in the presence of air to form oxides. Protactinium metal is a dense, silvery-gray material with a bright metallic luster which it retains for some time in air but it does readily react with oxygen, water vapor and inorganic acids to form various compounds. Protactinium is a radioactive element predicted to exist in 1871 by Mendeleev, although it was not discovered until 1917 or isolated until 1934.The element has atomic number 91 and element symbol Pa. Like most elements on the periodic table, protactinium is a silver-colored metal.

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As a metal, protactinium is dense and silvery-gray with a bright metallic luster, which it retains for some time in air.

Discovery: Fajans & Gohring 1913; Fredrich Soddy, John Cranston, Otto Hahn, Lise Meitner 1917 (England/France). Word Origin: Greek protos, meaning 'first'. Because protactinium is a rare element, it is not used for commercial purposes and only for scientific research. New York,

Protactinium is one of the rarest and most expensive naturally occurring elements. This element has few uses, since it is extremely rare and toxic and it is very short lived.

In 1961, the Great Britain Atomic Energy Authority was able to produce 125 grams of 99.9% pure protactinium, although they had to process about 55,000 kilograms of ore and spend about $500,000 to get it.

Protactinium was not isolated as a pure element until 1934 by Aristid von Grosse. Protactinium is a rare metal that reacts with inorganic acids, water vapor, and oxygen. Why do we sleep? These solids tend to stick to the surfaces of vessels in which they are contained. Discovery of the element is attributed to Otto Hahn and Lise Meitner, who discovered another isotope of protactinium, 231Pa in 1917. Stay up to date on the coronavirus outbreak by signing up to our newsletter today.

One of the rarest naturally occurring elements, protactinium occurs in Earth’s crust in average concentrations of a few parts per trillion. Protactinium has 29 radioisotopes.

That was the world’s only stock of the mental for many subsequent years.

Given that protactinium is only really seen in nuclear research, the people who handle it are well aware of the safety precautions they need to observe. Discovery: The existence of protactinium was predicted in 1871 by Dmitri Mendeleev. Other uranium decays produce isotopes of protactinium. This element was isolated in 1900 by William Crookes, but it took another 13 years for the element to actually be identified. The toxicity of the metal can cause organ and tissue damage, and because it is highly radioactive, it can cause an assortment of radiation-related health problems, from radiation sickness to death. The element is a dangerous highly radioactive alpha emitter (5.0 MeV) and requires precautions similar to those used when handling plutonium. New CDC guidelines say coronavirus spreads through air.

Some scientists believe that they may be able to find a stable isotope which could be used in more specific applications, and it has been surmised that the element could yield a potentially useful chain reaction. It occurs in all uranium ores to the extent of 0.34 part per million of uranium.

Therefore, uranium was positioned below tungsten in group VI, and thorium below zirconium in group IV, leaving the space below tantalum in group V empty and, until the 1950s, periodic tables were published with this structure.

Although protactinium has few uses aside from research purposes, it may be combined with the isotope thorium-230 to date marine sediments.

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William Crookes isolated protactinium from uranium in 1900, but he was unable to characterize it, so does not get credit for discovery. Protactinium also happens to be a superconductor at very low temperatures. The actinide element group was unknown at the time. Even if it was not radioactive, protactinium would present a health risk because the element is also a toxic metal. Receive mail from us on behalf of our trusted partners or sponsors?

There are no stable isotopes, and protactinium-231 is the most stable one.

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