0
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 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.
Does hydrogen have electrons than Uranium?
No, Uranium has far more electrons.
In a neutral atom number of electrons=number of protons=atomic number.
Hydrogen has 1 electron. Uranium has 92.
This energy source uses a rare metal called uranium for fuel?
A nuclear reactor is a plant which deliver electricity and (or) heat.
The function principle is the release of energy from nuclear fission of fissile materials as the isotope uranium-235.
The following is typical, but there are a number of variations, mostly minor:
Uranium is first found by exploration. It is then mined. The ore is milled to produce small pieces, which are then chemically leached to produce an uranate called yellocake. The yellowcake is reacted to produce uranium hexafluoride , which is then run through centrifuges to separate a heavier fraction from a lighter fraction. The lighter fraction is the enriched material used for power plants, the heavier is referred to as depleted. The enriched uranium is chemically converted to another oxide, uranium dioxide, and this is converted into the form of fuel used in plants, commonly by pressing and sintering. The fuel is encased in cladding of special steels or zircaloy, and then is ready to be put into the reactor.
There is a link to a more detailed answer below.
Where does uranium 235 come from?
Uranium 235 is a natural isotope of uranium (the concentration is approx. 0,7 %); uranium 235 is separated from the other uranium isotopes by different methods (centrifugation, gaseous diffusion;also on small scale by laser, mass spectrometric, ion exchange, etc.).
What is the noble gas configuraton for uranium?
The electron configuration of uranium is: [Rn]5f36d17s2.
How much does uranium 235 cost?
I suppose that the real price of enriched uranium is partially secret and also depends on the contract and the signing data. Also is a link between price and politics !
The most important is the enrichment percent in 235U: 3 % or 93 % ? And the quality: nuclear grade, weapons grade, standards for analysis (extremely expensive), etc.
