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The atomic number of uranium is 92, so its atoms have 92 protons in their nuclei. If uranium-235 absorbs a neutron, it would then have the mass number of 236. The number of neutrons is the mass number minus the atomic number, so the number of neutrons in the uranium-236 nuclei would be 236-92=144.
What else can I help you with?
Which part of an atom participates in the reaction shown below U235 plus n and acirc and 134 and 146 Xe134 plus Sr100 plus 2n?
The nucleus of the Uranium-235 (U235) atom participates in the nuclear reaction by absorbing a neutron (n) to form an unstable compound nucleus, which then undergoes fission into Xe134, Sr100, and two neutrons (2n).
How would the forces in a nucleus change if the number of neutral particles in the nucleus were increased?
The neutral particles, or neutrons, in an atomic nucleus, increase the attractive force (the strong nuclear force) operating in that nucleus. Neutrons are the glue of the nucleus, they hold it together. Remember that the protons, all of which have positive charges, repel each other. I would like to add that sometimes a heavy nucleus such as U235 will decay when it absorbs a neutron, which is not what you might expect based on my claim that a neutron helps to hold the nucleus together. This happens because the decay products, the daughter isotopes, jointly are more stable than the original isotope. So, you can make a nucleus more stable, but also create the possibility of a still more stable arrangement of daughter isotopes. Adding a neutron means that you have more neutrons with which to assemble other nuclei, from the existing collection of nucleons. And even when an existing nucleus is stable, the phenomenon of quantum tunneling allows it to change to an even more stable state of daughter isotopes.
What is the process in which an unstable nucleus loses energy spontaneously?
Particles or electromagnetic radiation are emitted.
What do you called in an element having the same atomic number but different atomic masses?
Isotopes. eg U235 and U238. Both Uranium, atomic number 92, bur different isotopes.
The concentration of U235 in the atomic bomb?
The references I have state Oralloy is 93.5% U235. Oralloy (Oak Ridge Alloy) was used in US Uranium atomic bombs as the fissile material. However they also say that any enrichment 20% U235 or higher is fissile and could be used to make a bomb, it would require a higher critical mass to work though. One source I have states that early Soviet Uranium atomic bombs used ~97% U235, but the US felt this level of enrichment to be unnecessary and excessively expensive.
Which part of an atom participates in the reaction shown below U235 plus n and acirc and 134 and 146 Xe134 plus Sr100 plus 2n?
The nucleus of the Uranium-235 (U235) atom participates in the nuclear reaction by absorbing a neutron (n) to form an unstable compound nucleus, which then undergoes fission into Xe134, Sr100, and two neutrons (2n).
How much energy is required to remove a neutron from ground state U-236 to make it U-235?
It is unclear exactly how a single neutron could be removed from a Uranium-236 nucleus to create a Uranium-235 nucleus. (It would probably prove quite difficult to do.) As to the energy required to do this, about all we can do is look at the binding energy of this nucleus. It turns out that the binding energy per nucleon in the U236 nucleus is about 7.6 MeV (million electron volts). This suggests that it would take a minimum of about 7.6 MeV to pluck that neutron from the U236 nucleus to create the U235 nucleus.
What do you use to split a uranium nucleus in nuclear fission?
To split a uranium nucleus in nuclear fission, you typically use a neutron to initiate the reaction. When a neutron collides with a uranium nucleus, it can cause the nucleus to split into two smaller nuclei, along with releasing additional neutrons and a large amount of energy.
What can isotopes of the same elements have a different number of what?
Neutrons in the nucleus of the element's atoms. It is the number of protons in the nucleus that determines what the element is. It is the total of neutrons and protons in the nucleus that gives the isotope number. Uranium generally comes in two isotopes, U235 and U238. All uranium is radioactive -- that is, it will decay into other elements over time. U238 is much more common and is very long lived radioactively and is not explosive and cannot be made into atomic bombs. U235 is much rarer, but is highly radioactive and can be made into atomic bombs. The two isotopes are mixed together at the atomic level. This is what Iran is trying to do now in it's efforts to concentrate enough U235 to make a bomb -- the process is called "enrichment."
How would the forces in a nucleus change if the number of neutral particles in the nucleus were increased?
The neutral particles, or neutrons, in an atomic nucleus, increase the attractive force (the strong nuclear force) operating in that nucleus. Neutrons are the glue of the nucleus, they hold it together. Remember that the protons, all of which have positive charges, repel each other. I would like to add that sometimes a heavy nucleus such as U235 will decay when it absorbs a neutron, which is not what you might expect based on my claim that a neutron helps to hold the nucleus together. This happens because the decay products, the daughter isotopes, jointly are more stable than the original isotope. So, you can make a nucleus more stable, but also create the possibility of a still more stable arrangement of daughter isotopes. Adding a neutron means that you have more neutrons with which to assemble other nuclei, from the existing collection of nucleons. And even when an existing nucleus is stable, the phenomenon of quantum tunneling allows it to change to an even more stable state of daughter isotopes.
How does uranium boil water to produce electricity?
Uranium, especially the isotope U235, has a large, unstable nucleus. It's unstable because all the positively charged protons in the nucleus are trying to repel each other. They are being held together by the strong nuclear force. Since strong force can only act over very short distances and the U235 nucleus is so large the nucleus is unstable. It tends to want to split into two smaller and thus more stable elements. When this happens it is called nuclear fission. In nuclear power plants we can split the U235 atom on purpose by hitting it with something. This something is a neutron. The neutron has no charge so it can smash into the nucleus and not just bounce off like proton would. Strangely it all works best if we use a slow moving neutron instead of a fast one. A fast neutron, because of quantum smearing, isn't in one place long enough to have any effect. A slow one, though, can be captured briefly by the U235 nucleus. Once the neutron is captured the nucleus is too large to hold together any longer splits apart. The really neat part is that the mass of the nucleus before it split and the mass of all the pieces afterward are different. Something has gone missing. A very small bit of mass has disappeared. Only Albert Einstein can tell us where it went. His famous equation e=mc^2 tells us that a small amount of mass can become a large amount of energy, and that is just what happens in nuclear fission. The missing mass becomes energy, in this case heat energy. The heat boils water. The steam turns a turbine which spins a generator, making electricity.
The atoms that remain after a nucleus disintegrates is?
smaller then the original atom and possibly radioative
Why is large mass of uranium-235 needed for a chain reaction?
Each time a U235 atom decays, it emits 2-3 neutrons. The likelihood that one of these neutrons is captured by another U235 atom INCREASES with more mass. The SHAPE of this mass will also play a role, imagine a thin wire of U235, compared to a sphere, with regards to how likely a chain reaction will occur. Neutron reflection can also help redirect an errant neutron back into the mass so it can react instead. Compression (increase of density) plays a role as well.
What are the Specifications for uranium used in nuclear power plants?
The uranium is in the form of uranium dioxide, UO2, which is produced in small cylinders and assembled inside a zircaloy sealed sheath. The individual zircaloy tubes filled with uranium are then made up into a fuel assembly, the number in each assembly varies from one design to another. The uranium itself is enriched to about 4 percent U235. Natural uranium has about 0.7 percent U235, which is the isotope required for slow neutron fission.
What causes fission?
Only certain elements are fissionable, or at least with practical means. The fission of for example the atom U235 happens when it is struck by a slow neutron, it splits, which is fission, releasing two smaller atoms and two or three neutrons (products). The products from the nuclear reaction weigh less then the original atoms. The difference in weight is converted into energy.
How many neutrons are in Element 92?
Element number 92 is Uranium and there are two main isotopes - U235 and U238. In U235 there are 92 protons so there are 235 - 92 = 143 neutrons. In U238 there are thus 146 neutrons
Where does the nuclear enengy come from?
It comes from the fission of certain nuclei, mostly U235 and Pu239. Every fission of a nucleus of an atom of these materials releases a certain amount of energy as heat.
