Helium is most commonly used in diving, welding and for inflating balloons. Helium is often inhaled to change a persons voice, it does this as being lighter than Nitrogen and Oxygen it allows sound to travel faster so it sounds more high pitched. Helium belongs to Group 18 the Noble Gases, a non metal that is a gas. It has a melting point of -272°c and a boiling point of -268°c. Helium was discovered Pierre Janssen and Norman Lockyer who conducted work on the analysis of the spectrum of the sun. It is named after the Greek word for sun Helios. Helium is most abundantly found in the sun where it is formed from nuclear fission of Hydrogen atoms.
Sir William Ramsey, Nils Langet, P.T.Cleve