The chemical element with the symbol 'H' is hydrogen. Hydrogen is the simplest and most abundant element in the universe, consisting of one proton and one electron. It is a colorless, odorless gas at room temperature and is primarily found in stars, including our sun, where it undergoes nuclear fusion to produce helium and energy. Hydrogen plays a crucial role in various chemical processes and is considered an essential building block for life, forming water when it combines with oxygen. Its potential as a clean energy source, especially for fuel cells, makes it a focus of contemporary energy research.