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Uranium
Uranium is a heavy element with the atomic number 92 and the symbol U. In 1789 it was discovered in the mineral pitchblende by Martin Heinrich Klaproth , who named it after the planet Uranus
586 Questions
What is a metric ton of uranium worth?
A metric ton of the oxide U3O8 (the usual commercial form) worth now approx. 90 000 US $.
Prices of uranium (as for other products) are very variable.
What substance is uranium used in?
Applications of uranium:
- nuclear fuel for nuclear power reactors
- explosive for nuclear weapons
- material for armors and projectiles
- catalyst
- additive for glass and ceramics (to obtain beautiful green colors)
- toner in photography
- mordant for textiles
- shielding material (depleted uranium)
- ballast
- and other minor applications
What are some the products made from uranium?
Some products made from uranium include nuclear fuel for power plants, nuclear weapons, and certain medical devices for radiation therapy and imaging. Uranium is also used in some specialized applications, such as in radiation detection equipment and certain types of glass and ceramics.
What does uranium and plutonium do inside a bomb?
The critical mass of plutonium is lower, plutonium is not so expensive as highly enriched uranium, the technology to obtain plutonium is more simple than the isotopic separa-tion of uranium, etc.
What did Becquerel discovered from uranium?
He found that uranium is radioactive. Uranium is in the f block. Atomic number of it is 92.
What makes uranium a non renewable resources?
Uranium 235 is consumed partially during the activity in reactor. The fuel may be recycled to extract the remaininig uranium and plutonium. But it can only do a few times.
Then you have other types of reactors but it is not possible to the infinite ! The fuel is exhausted or degraded.
How is uranium 235 and uranium 238 similar?
Uranium-235 and uranium-238 are natural, radioactive isotopes of uranium; they have 92 protons and electrons but the number of neutrons is different:
- for 235U: 143
- for 238U: 146
Does uranium have a oder or color?
Uranium does not have a distinct odor. It usually appears as a silvery-white metal in its natural form and can have different colors when it forms compounds. For example, uranium oxide compounds can range in color from yellow to green to black.
How many neutrons are in a normal uranium atom?
Uranium has 92 electrons and protons.
Uranium-234 has 142 neutrons, uranium-235 has 143 neutrons and uranium-238 has 146 neutrons.
What is the equation for uranium decay?
Uranium-237 will undergo beta minus decay to neptunium-237 according to the following equation: 92U237 => 93Np237 + e- + 0.519 MeV At the risk of being a bore, a neutron in U237 undergoes a weak interaction-mediated change into a proton and an electron. The electron will be ejected from the nucleus immediately. Along with the electron, which leaves with a lot of kinetic energy, we'll see an antineutrino and the decay energy (0.519 MeV).
No, carbon is not malleable. Pick a form, hit with a hammer, and it won't "flatten out" like, say, gold. Carbon in the form of graphite or diamond won't do well when struck.
What is uraniums atomic number?
Uranium is a radioactive element. It is in the f block. We use it for make energy.
Yes, uranium is oxidized in air even at room temperature (surface oxidation) but at high temperature the oxidation is total; the formed oxide is U3O8.
What are the fertile isotopes of Uranium?
There are many isotopes for uranium, the most abundant of them in nature are:
- Uranium- 234, having 142 neutron and 92 proton
- Uranium- 235, having 143 neutron and 92 proton
- Uranium- 238, having 146 neutron and 92 proton
- Uranium-234: 0.006 %
- Uranium-235: 0.720 %
- Uranium-238: 99.274 %
What is the group of periodic table of uranium?
Uranium does not have a group it belongs to, but it is in period 7.
Is uranium a soiled luquid or gas?
Uranium is a solid at normal temperatures, melting at 1132° C and vaporizing above 3818° C.
What has a greater number of atoms a gram of lead or a gram of uranium?
The lead atom is way heavier than the helium atom. We know this by referring to the Periodic Table of Elements. The atomic mass of lead (Pb) is 207, while that of helium (He) is 4. Therefore, we can estimate that an atom of lead is about 50 times heavier than an atom of helium.
Uranium is a natural chemical element, solid, metal.
Uranium is largely used as nuclear fuel in nuclear reactors to deliver energy (electricity or heat).
Why do they use uranium in power stations?
Because uranium-235 can easily be made to fission in a reactor with a moderator to slow the neutrons down, a chain reaction can be sustained, and heat is generated which can be harnessed for electricity. Uranium is usually used because it is the largest naturally occurring atom. A smaller atom would not split as easily, and a larger atom would first need to be created before it could be split.
Also Uranium-235 is the only isotope capable of undergoing fission and supporting a chain reaction of any element on earth that occurs naturally at high enough levels (0.72% of natural Uranium) to make it economically extractable. Other fissionable materials have to be produced in sufficient quantities in "breeder reactors" where the radiation converts certain non-fissionable elements into other fissionable elements through neutron capture. Because uranium is much more common that was believed early in the development of nuclear reactors, it is much more economical to refine naturally occurring uranium (separating the U-235 from U238) than to use breeder reactors to convert non-fissionable isotopes into fissionable ones and then refine the result to produce more nuclear fuel.
A very slightly different world (e.g. older) and nuclear energy and weapons might never have been possible at all.
How much does uranium cost in US dollars by the gram?
The price for the oxide U3O8 is cca. 0,08 USD/g.
What happens when a neutron hits a large uranium nucleus?
One thing that can happen when a neutron interacts with a uranium atom is called scattering. The neutron "bounces off" the uranium. Aside from scattering, a neutron has a possibility of being absorbed by the uranium nucleus, and this can cause several different reactions, depending on which isotope of uranium is involved in the reaction. It is neutron absorption that is the mechanism utilized in the chain reactions in nuclear weapons and in nuclear reactors. Nuclear fuel, which is often uranium-235, fissions by absorbing a neutron. In the case of uranium-238, we make plutonium by getting that isotope to absorb a neutron. There is a lot more to learn, and you'll find related links below to get you going.
What is uranium hexafluoride made from?
Uranium hexafluoride is made from uranium dioxide or uranium tetrafluoride by adding fluorine gas. The process involves reacting uranium compound with an excess of fluorine gas under controlled conditions to produce uranium hexafluoride.
