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Created page with "==Introduction== Helium (Helium) is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions. ==Discovery== Helium was first detected as an unknown, yellow spectral line signature in sunlight during a solar eclips..."