The chemical element represented by the symbol He is helium. Helium is a colorless, odorless, and inert gas, categorized as a noble gas. It is the second lightest element in the universe and is primarily produced through nuclear fusion in stars. Helium is commonly used in balloons, as a coolant in cryogenics, and in various scientific applications due to its unique properties. Its non-reactive nature makes it safe for several applications, keeping it from easily forming compounds with other elements.