This time is known as the half-life.
Yes, fission products typically have smaller nuclei than the reactants. During fission, a heavy nucleus splits into two or more smaller nuclei, releasing energy and neutrons. These fission products are generally lighter and more stable than the original nucleus.
Products of a nuclear fission reaction typically include smaller atomic nuclei (fission fragments), neutrons, and a release of energy. However, products that are not generated in a fission reaction include unchanged parent nuclei, as they undergo transformation, and stable isotopes that do not result from fission. Additionally, elements heavier than uranium, such as some transuranic elements, are not direct products of fission but may be formed from neutron capture processes.
The reactants are Hydrogen atoms and products are Helium atoms. Because Helium atoms are larger than Hydrogen atom, large amount of energy is released from the net binding energy that resulted during the fusion process.
The end products of nuclear fusion in the sun are helium nuclei (alpha particles) and energy in the form of gamma rays and neutrinos. Four hydrogen nuclei combine to form one helium nucleus through a series of fusion reactions.
not sure you're asking exactly but I think the answer your looking for is radioactive half-life
It is called a radioisotope.
No, atomic nuclei is not required for a chemical reaction.
The half-life of a radioisotope is the time it takes for half of the radioactive nuclei in a sample to decay. It is a characteristic property of each radioisotope and determines the rate at which the isotopes decay.
The products of mitosis are two genetically identical nuclei
Yes, fission products typically have smaller nuclei than the reactants. During fission, a heavy nucleus splits into two or more smaller nuclei, releasing energy and neutrons. These fission products are generally lighter and more stable than the original nucleus.
Helium
If the nucleus is changing due to natural causes this would be due to being radioactive and emitting alpha or beta particles. If it is caused by irradiation in a neutron flux it would be called a radioisotope.
A large amount of kinetic energy is required to force nuclei together because nuclei are positively charged and repel each other due to electromagnetic forces. Overcoming this repulsion requires a significant amount of energy to bring the nuclei close enough for the strong nuclear force to take effect and bind them together in a nuclear reaction.
The incredible temperatures required.
One thing that makes fusion products different from fission products obviously is the fact that fusion products are heavier than the original two nuclei and fission products are lighter than the original nucleus
Half life is the time taken for approximately half of the available nuclei in a sample of radioactive material to decay into something else. It's a characteristic of the isotope, for example, the half life of the isotope of iodine, I131 is 8.08 days. Half lives can vary from fractions of a second to thousands of years.
It is called nuclear fission as in this process the heavy nuclei are split into fragments (or fission products).