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Atomic symbol - He
Atomic weight - 4.002602
Atomic number - 2
Electron configuration - 2
Oxidation states - 0
State of matter - gas
Noble gas element
Discovered in 1895 by Sir William Ramsay
Boils at -268.9 .C, melts at -272.2 .C
Solubility, ml./100 ml. water is 1.49

Notes:
Helium is obtained from natural gas deposits by liquefying all other
constituents and collecting helium. The percentage obtained from these
deposits may range from 1% to 2%.

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