Helium: Difference between revisions
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imported>Milton Beychok m (Replaced infobox template) |
imported>Milton Beychok (Added some info to the infobox) |
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|properties= Inert, colorless, odorless, non-toxic gas | |properties= Inert, colorless, odorless, non-toxic, non-flammable gas | ||
|compounds= | |compounds= | ||
|uses= | |uses=Cryogenics, welding, inert purging gas | ||
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Revision as of 22:13, 16 April 2011
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Helium is a chemical element, having the chemical symbol He. Its atomic number (the number of protons) is 2. It has a standard atomic weight of 4.002602, and is typically found as a gas in its elemental form.
Helium is considered to be a member of the "Noble gas" class of element. At a pressure of 101.325 kPa, it has a boiling point of -268.93 °C, and a melting point of -272.2 °C.