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Uranium-238 decays through a well-known process into lead-206. Since the formation of certain minerals precludes the existence of lead but not uranium, it can be certain that when the mineral was formed it no lead in it. By measuring the ratio of remaining uranium to existing lead, the amount of time since the crystal formed can be determined.
Wiki User
∙ 16y ago
Wiki User
∙ 15y agoU-238 is an isotope because it has 92 protons and 146 neutrons. Other isotopes of uranium have a different number of neutrons.
Wiki User
∙ 14y agoUranium 238 can be used in weapons, armors, as a nuclear fuel in breeder reactors, as radiation shield, etc.
Wiki User
∙ 11y agoBoth of them have similar number of protons and electrons. Hence they have the same atomic number.
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How much neutrons have uranium?
Uranium has many isotopes and each isotope has a different number of neutrons (N). N = atomic weight of the isotope - atomic number of uranium (A=92) The number of neutrons of the isotope 92U238 is 238-92=146 and the number of neutrons of the isotope 92U235 is 235-92=143.
Enriched uranium uranium 235 or uranium 238?
Enriched uranium is still usually mainly 238U, but it has a higher percentage of 235U than the natural abundance. Depleted uranium is exactly the opposite: it's got a LOWER than normal amount of 235U.
The atomic structure of isotope?
the atomic structure of an isotope is cyristal like
Uranium 235 and uranium 238 are isotope they are chemically different why?
I LIKE PIGS IN A BLANKET I think ,because when hit Uranium-238 by a neutron, it becomes uranium-239, an unstable isotope which returns into neptunium-239, which then itself decays, with a half-life of 2.355 days, into plutonium-239. ------------------------ Differences in nucleus stability and nuclear cross sections for fission with thermal neutrons. Some details at: http://nuclearweaponarchive.org/Library/Fission.html
Why can ordinary uranium not be used to fuel a reactor cooled by ordinary water?
Because "ordinary" uranium is mostly 238U, which won't fission and create a chain like its lighter cousin 235U will. When critical mass is achieved with the 235U isotope of uranium, fission will occur spontaneously. Or with a significantly enriched uranium fuel (one where the natural concentration of 235U has been increased a bunch so the fuel has a much higher percentage of this isotope), fission and a chain reaction is also possible. But with just natural uranium, a big pile of it will just sit there. It won't fission and create a chain reaction. Note that 238U is radioactive and decays over time because it is unstable, but it has a long half-life. Also, the fact that it's unstable (radioactive) doesn't mean it's fissile. It isn't.
Why is it necessary to enrich the uranium before manufacturing the fuel pellets?
Natural uranium is only 0.72% fissile uranium-235 isotope. This is only fissionable when using heavy water as the moderator to slow the fission neutrons. With any other moderator you need 3% to 5% uranium-235 isotope. For unmoderated fast neutron reactors like breeders you need 20% to 95% uranium-235 isotope.
What does uranium 234 looks like?
Uranium 234 is a natural isotope of uranium. Some characteristics: Atomic mass: 234,040 952 088 ± 0,000 001 960 amu Protons and electrons: 92 (atomic number) Neutrons: 144 Halflife: 2,455.105 years Concentratiom in natural uranium: 0,0058 % Uranium 234 has no technical use.
How much neutrons have uranium?
Uranium has many isotopes and each isotope has a different number of neutrons (N). N = atomic weight of the isotope - atomic number of uranium (A=92) The number of neutrons of the isotope 92U238 is 238-92=146 and the number of neutrons of the isotope 92U235 is 235-92=143.
Are female scientists more important than male scientists back then?
No, in fact, male scientists were more important that female. Back then, women were not yet respected like they are today.
What are Canada's main exports to the UK?
It used to be Furs but today it is Gold, Diamonds, Jewelry, Uranium and metals. Aircraft and machinery are also important but the largest are resources like Gold, and Uranium.
Enriched uranium uranium 235 or uranium 238?
Enriched uranium is still usually mainly 238U, but it has a higher percentage of 235U than the natural abundance. Depleted uranium is exactly the opposite: it's got a LOWER than normal amount of 235U.
What naturally occurring radioistope is used as the fuel for a nuclear reactor?
Uranium is usually the element of choice for nuclear fuel. We also like to recover the uranium-235 isotope for fuel if we can. Some reactors use mostly U-235 for fuel, and some use a bit of U-235 in with U-238 for fuel.
How many protons and neutrons in uranium 239?
The isotope plutonium-239, which is synthesized from uranium, has 94 protons (like all isotopes of plutonium) and 145 neutrons in its nucleus. Use the link below for more information on plutonium.
How is uranium bad?
Uranium is just like nuclear energy
The atomic structure of isotope?
the atomic structure of an isotope is cyristal like
How does uranium turn the turbine in a power station?
Radioactivity produces a certain amount of heat, and uranium has the interesting property that you can increase its rate of radioactive decay by creating a certain density of specific isotopes (decaying uranium atoms emit neutrons which can be absorbed by other uranium atoms making them unstable, so that they too will decay). Therefore, uranium can be used as a source of heat - much like burning coal - and that heat can be used to boil water and run a steam turbine.
What would life be like without uranium?
Without uranium and nuclear energy the exhaustion of fossil fuels will be more important year after year. Also nuclear energy don't contribute to global warming.
