Article
Article
Helium
Article By:
Vos, Willem L. Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution, Washington, DC.
Last reviewed:January 2020
DOI:https://doi.org/10.1036/1097-8542.312300
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- Helium, published January 2014:Download PDF
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A gaseous chemical element, chemical symbol He, atomic number 2, and atomic weight 4.0026. Helium is one of the noble gases in group 18 of the periodic table. It is the second-lightest element. The world's chief source of helium is a group of natural gas fields in the United States. See also: Chemical element; Noble gases; Periodic table
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