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Electronegativity: An atom's chemical behavior in which it attracts the shared electron pair to itself is known as electronegativity. As the number of energy levels grows larger, electronegativity decreases.

Slow neutron capture is involved in the s-process. When a nucleus captures a neutron and the resulting nucleus is unstable, beta decay occurs, resulting in a larger nucleus. This process produces stable isotopes up to ${}^{\text{209}}\text{Bi}$for most heavy elements.

The r-process, on the other hand, involves the rapid capture of a nucleus by neutrons. Because the atoms that undergo this process require fast fusion because their half-lives are too short to occur via the s-process, multiple neutron captures and beta decays occur within seconds.