Uranium U-235 Chain Reaction !

Uranium U-235 Chain Reaction !

nuclear chain reaction occurs when one single nuclear reaction causes an average of one or more subsequent nuclear reactions, thus leading to the possibility of a self-propagating series of these reactions. The specific nuclear reaction may be the fission of heavy isotopes (e.g. 235U). The nuclear chain reaction releases several million times more energy per reaction than any chemical reaction.

Nuclear chain reactions are series of nuclear fissions (splitting of atomic nuclei), each initiated by a neutron produced in a preceding fission. For example, 21/2neutrons on the average are released by the fission of each uranium-235 nucleus that absorbs a low-energy neutron.

Uranium was apparently formed in supernovas about 6.6 billion years ago. While it is not common in the solar system, today its slow radioactive decay provides the main source of heat inside the Earth, causing convection and continental drift.

Nuclear fission seen with a uranium-235 nucleus.
The fission of one atom of U-235 generates 202.5 MeV = 3.24 × 1011 J, which translates to 19.54 TJ/mol, or 83.14 TJ/kg. [2] This is around 2.5 million times more than the energy released from burning coal. [3] When 235.

When a uranium-235 or plutonium-239 nucleus is hit by a neutron, the following happens: the nucleus splits into two smaller nuclei, which are radioactive. two or three more neutrons are released. some energy is released.

An interactive animation showing how a chain reaction progresses. A fast-moving neutron causes the Uranium-235 to decay, releasing two fast-moving electrons that go on to strike more Uranium atoms that then decay.

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