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Liquid helium - Wikipedia
Helium - Density and Specific Weight vs. Temperature and Pressure
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By: Alyssa Parsons. Helium has the lowest melting point and boiling point of the elements, so it only exists as a gas except under extreme conditions. - ppt download
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Helium | Definition, Properties, Uses, & Facts | Britannica
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Helium enthalpy corresponding to several absolute pressure values. The... | Download Scientific Diagram
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Helium Name : Helium Atomic Number : 2 Element Symbol : He. - ppt video online download
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Liquid helium - Wikipedia
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Interactive Periodic Table of Elements
