A graph of the number of neutrons versus the number of protons for all stable naturally occurring nuclei.
Nuclei that lie to the right of this band of stability are neutron poor; nuclei to the left of the band are neutron-rich.
The reaction is usually accompanied by the ejection of one or more neutrons.
In 1934 Enrico Fermi proposed a theory that explained the three forms of beta decay.
The excess energy associated with this excited state is released when the nucleus emits a photon in the -ray portion of the electromagnetic spectrum.
Most of the time, the -ray is emitted within 10Nuclides with atomic numbers of 90 or more undergo a form of radioactive decay known as spontaneous fission in which the parent nucleus splits into a pair of smaller nuclei.
The larger the binding energy, the more stable the nucleus.Alpha decay of the The sum of the mass numbers of the products (234 4) is equal to the mass number of the parent nuclide (238), and the sum of the charges on the products (90 2) is equal to the charge on the parent nuclide.Nuclei can also decay by capturing one of the electrons that surround the nucleus.This calculation helps us understand the fascination of nuclear reactions.The energy released when natural gas is burned is about 800 k J/mol.