Helium

A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics.

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Tree Number(s): D01.268.613.350, D01.362.641.352

MeSH Unique ID: D006371

Registry Number: 206GF3GB41

Entry Terms:

• Helium-4
• Helium 4

All MeSH Categories
Chemicals and Drugs Category
Inorganic Chemicals
Elements
Noble Gases
Helium

All MeSH Categories
Chemicals and Drugs Category
Inorganic Chemicals
Gases
Noble Gases
Helium