Which element has the atomic number 1?

Hydrogen, represented by the symbol 'H', has the atomic number 1, meaning it has one proton in its nucleus. It is the lightest and most abundant element in the universe, forming the primary building block of stars and gas giants. Hydrogen plays a crucial role in chemical reactions, including water formation and fuel cell energy production. In its diatomic form (H├óÔÇÜÔÇÜ), it exists as a colorless, odorless gas. Its abundance and energy potential make it a focal point in renewable energy research, especially for hydrogen-powered systems.