Question

Explain how hydrogen and helium nuclei were first formed in the universe.

Answer 1

The low mass, elements hydrogen, and helium were produced in the hot, dense conditions of the birth of universe itself. The birth, life, and death of a star are described in terms of nuclear reactions. The chemical elements that make up the matter we observe throughout the universe were created in these reactions.

Answer 2

Hydrogen and helium nuclei were formed in the universe through a process called nucleosynthesis. deuterium ( a hydrogen isoptope) nuclei were formed when protons and neutrons combined. neutrons combined with deuterium nuclei to form tritium. a proton would then fuse with tritium to form helium nuclei.