HeliumByYasarOzkan - Introduction Histroy Phases Isotopes...

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Introduction Histroy Phases Isotopes Properties Occurence Manufacturing Process Uses Biological Effects
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Helium (He) is a colorless, odorless, tasteless, non- toxic, inert monatomic chemical element that heads the noble gas series in the periodic table and whose atomic number is 2. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions
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On Octorber 20 of the same year, Norman Lockyer discovered Helium element. Evidence of helium was first detected on August 18, 1968 by Pierre Janssen.
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World’s first helium-filled airship made in America in 1921 In 1903, Erasmus Haworth discovered Helium in a natural gas after an oil drilling operation
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Gas and Plasma Phases Helium gas is the least reactive member of  elements  It is inert and monatomic in virtually all conditions  Throughout the universe, helium is found mostly  in a plasma state 
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This note was uploaded on 03/24/2010 for the course CHEMENG CHE 117 taught by Professor Özcanbeşergil during the Winter '08 term at Ege Üniversitesi.

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HeliumByYasarOzkan - Introduction Histroy Phases Isotopes...

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