How does nucleosynthesis work?

Hint: Nucleosynthesis is that the process that makes new atomic nuclei from pre-existing nucleons and nuclei. consistent with current theories, the primary nuclei were formed a couple of minutes after the large Bang, through nuclear reactions during a process called explosion nucleosynthesis.

Complete answer:
Elements lighter than iron release energy if additional nucleons are added to their nuclei. Nucleons are protons and neutrons. This process is named fusion .
Each element is defined by the amount of protons in its nucleus. Nuclei with an equivalent number of protons but different numbers of neutrons are called isotopes. just some combinations of protons and neutrons are stable. Nucleosynthesis is the process by which heavier elements are created. There are several different mechanisms for this.
Nucleosynthesis is the creation of the latest atomic nuclei, the centers of atoms that are made from protons and neutrons. Nucleosynthesis first occurred within a couple of minutes of the large Bang. At that point , a quark-gluon plasma, a soup of particles referred to as quarks and gluons, condensed into protons and neutrons.
After the universe cooled slightly, the neutrons fused with protons to form nuclei of deuterium, an isotope of hydrogen. Deuterium nuclei then combined to form helium. Further reactions between protons, neutrons, and different isotopes of helium produced lithium. The hydrogen and helium produced during this phase of the universe eventually created the universe’s first massive stars.

Note:
Since then, the nuclear reactions within the life and death of stars have formed most of the opposite nuclei within the universe. Stars can create nuclei through two processes: either by combining two smaller nuclei (called fusion) or breaking a bigger nucleus into multiple nuclei (called fission). Both ways end in new atoms.