Nuclear fission is when a neutron is fired at an element with a high atomic number, which splits and releases more neutrons and energy as a result. Nuclear fusion occurs in stars and experimental reactors.
This shows that the reaction is endothermic because energy is absorbed in the reaction and not produced.
In the electrostatic forces between the positive atomic nuclei and the negative atomic electrons.
The free energy (delta G) is the measure of the amount of energy produced or consumed in a reaction. Enthalpy (delta H) is a measure of the amount of heat produced or consumed in a reaction. These two quantities can sometimes be the same. When they are not, the other missing component where heat can be consumed or produced is work.
Exothermic reactions release energy. Endothermic reactions absorb energy.
Radiation
Decrease activation energy for a reaction by giving an alternate reaction mechanism. Therefore more of the substance will be able to be produced in a shorter amount of time.
High Energy produced with high velocity which required for nuclear reaction
Most energy is produced by the breaking and reforming of molecular bonds. A car's combustion reaction in which fuel is converted into energy, co2 and water is a good example of this. Energy is rarely produced on the atomic level, such as a nuclear power plant or an atom bomb. Energy is produced this way through Einstein's E=mc^2. In an atomic reaction the mass of the products is slightly less then the mass of the reactants. Plug the change in mass into Einstein's equation and you get a lot of energy. To recap, most energy is made on the molecular level with endothermic (reactions which absorb energy) and exothermic reactions (reactions which emit energy), however a small amount takes place on the atomic level.
The fission of uranium-235 nuclei
This form of energy is the nuclear energy.
the energy produced by the reaction.
It is fusion - the fusion of hydrogen into helium - accompanied by a gigantic release of binding energy that feeds the reaction and generates radiation in the form of light, heat, etc.
Provide an alternate pathway with a lower activation energy for a reaction
Energy is produced in batteries due to chemical reaction.
This shows that the reaction is endothermic because energy is absorbed in the reaction and not produced.
Fusion occurs when two atomic nuclei collide. The reaction that is produce by the collision can be used to provide energy. Fusion is the reaction that powers most active stars in the universe.
A nuclear reaction, such as a nuclear bomb or in a nuclear power plant, creates nuclear radiation, which is different then gamma radiation. Gamma radiation is produced primarily by the natural decay of high energy states in atomic nuclei (gamma decay). Or from cosmic sources such as pulsars and radio galaxies. Nuclear radiation is caused by the high energy reaction of atomic particles being broken apart (splitting atoms)