Liquid helium - Alchetron, The Free Social Encyclopedia
alchetron.com
Liquid helium - Alchetron, The Free Social Encyclopedia
At standard pressure, the chemical element helium exists in a liquid form only at the extremely low temperature of 269C (about 4 K or 452.2F). Its boiling point and critical point depend on which isotope of helium is present the common isotope helium4 or the rare isotope helium3. These are
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