1. Formation of Helium:
* Process: When hydrogen nuclei (protons) fuse together, they overcome their electrostatic repulsion and combine to form a helium nucleus. This process releases a tremendous amount of energy.
* Change: The original hydrogen atoms are converted into a new element, helium. This change in the elemental composition is fundamental to the evolution of stars.
2. Release of Energy:
* Process: The fusion process converts a tiny portion of the mass of the hydrogen atoms into pure energy, following Einstein's famous equation E=mc².
* Change: This released energy is what makes stars shine. The heat and light emitted by stars are a direct result of the ongoing fusion of hydrogen within their cores.
These two changes - the creation of helium and the release of energy - are the defining characteristics of hydrogen fusion and are critical to understanding the universe as we know it.
