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.
For fusion, the main disadvantage is that nobody has been able to make it work. However it does have promise and if it can be developed it will not produce the dangerous fission products that fission does. For fission, see reply to question 'What are the disadvantages of nuclear fission power'
Fission products are the fragments resulting from the fission of heavy nuclids during nuclear fission process
nuclear fission
Fission
- for spontaneous fission the cause is an inconvenient ratio between neutrons and protons- bombardment of the nucleus with particles, especially neutrons
the evaporation causes nuclear fission which therefore causes the object c341o to become C12a.
Nuclear fusion
A large release of energy from atomic nuclei, either via fission or fusion.
For fusion, the main disadvantage is that nobody has been able to make it work. However it does have promise and if it can be developed it will not produce the dangerous fission products that fission does. For fission, see reply to question 'What are the disadvantages of nuclear fission power'
A large release of energy from atomic nuclei, either via fission or fusion.
Share A chemical reaction that causes the next one
A large release of energy from atomic nuclei, either via fission or fusion.
There are several types of nuclear transformation:Alpha decay causes the ejection of a Helium Nucleus.Beta decay causes the ejection of an electron and a neutrino while one neutron in the nucleus becomes a proton.Gamma decay causes the ejection of a very high energy photon.Fission causes a massive nucleus to split into two smaller ones, usually about 1/3s and 2/3s the mass of the original nucleus, and a few neutrons. Some isotopes of elements that fission can fission spontaneously, some can't. In those isotopes that can't fission spontaneously, fission is triggered by neutron capture.Fusion causes light nuclei to merge into heavier ones. This only happens at very high temperature and pressure.Capture causes a nucleus to absorb another particle, usually a neutron, and transmute into a different isotope or element. Capture is usually followed by one of the types of decay.
You get nuclear fission in:nuclear fission reactorsatomic fission bombs
The fission process in a nuclear reactor which produces the thermal energy used in the steam cycle, is called a chain reaction because nuclei of U-235 and Pu-239 fission on absorbing a neutron, and the fission causes further neutrons to be released, thus a self sustaining reaction is started which is controlled to run at a steady power level.
Sudden release (in a few microseconds) of nuclear energy via fission, fusion, or a combination of both.
The heat and the light in stars is the same thermal nuclear fission that our Sun (a star) produces.