The element represented by the symbol 'H' is hydrogen. Hydrogen is the simplest and lightest element on the periodic table, consisting of just one proton and, typically, one electron. It is a colorless, odorless gas at room temperature and is highly flammable. Hydrogen is primarily found in nature combined with other elements, such as in water (H2O) or hydrocarbons. As a key building block of the universe, hydrogen plays a crucial role in various chemical reactions, particularly in energy production, and is increasingly being explored as a clean fuel source for the future.