Helium

Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert gas that heads the noble gas series in the periodic table. Its boiling and melting points are the lowest among all the elements. Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined.

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Helium has many important industrial and scientific applications. It is commonly used as a cooling agent for nuclear reactors, MRI machines, and other high-tech equipment. It is also used in the production of semiconductors, fiber optic cables, and LCD screens. Helium is also used in the medical industry for respiratory treatments and as a carrier gas for chromatography. Additionally, helium is used for party balloons, blimps, and other forms of entertainment.