The neutron-to-proton ratio refers to the number of neutrons compared to the number of protons in an atomic nucleus.
Isotope: Different versions of an element with the same number of protons but different numbers of neutrons.
Nuclear Stability: The ability of an atomic nucleus to remain intact without undergoing radioactive decay.
A type of radioactive decay where a neutron is converted into a proton, resulting in a change in the neutron-to-proton ratio.