Helium

Helium (from Greek: Helios), is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, and the first gas in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements. Helium is the second lightest and second most abundant element in the observable universe. It is present at about 24% of all elemental mass. Most helium in the universe is helium-4. Large amounts of new helium are being created by nuclear fusion of hydrogen in stars.