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8 fun facts about helium 1. Helium is the second most abundant element in the universe, after hydrogen. 2. Helium is the second lightest element, with an atomic mass of 4.002602. 3. Helium has the lowest melting point and boiling point of any element. 4. Helium is a monatomic gas, existing as individual atoms rather than molecules. 5. Helium is ...
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