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Helium
Atomic #: 2 # of Protons: 2 # of Electrons: 2 Symbol: He
Mass #: 4.0026 amu # of Neutrons: 2
Period #: 1 Group #: 18 Dot diagram: He:
Physical properties
Boiling point: 268.93399 degrees C No common compounds
Melting Point: 272.2 degrees C Abundancy: Very common
Density: 0.1786 g/L Nonmetal
Odor: Odorless
Color: Colorless
Taste: no taste
State of Matter: gas
Discovered by: Peirre Janssen
In: 1868
Named from: Sun (Greek name)
Greek name for sun is helips
Production
Obtained from liquifacation of natural gas
Common uses: balloon, air ships, added to oxygen tanks for easier breathing
http://www.webelements.com/helium/
http://wiki.answers.com
Sources
$20-$40
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