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What is the degrees of freedom of helium gas ?

  1. Mar 21, 2010 #1
    what is the degrees of freedom of helium gas ?

    shouldn't helium gas be diatomic ? If so , it will be 5 .

    i have problems differentiating monoatomic and diatomic . Though its obvious that mono is one atom and diatomic is 2 atoms . Is it possible to know whether its mono or diatomic from the periodic table ?
     
  2. jcsd
  3. Mar 21, 2010 #2

    kuruman

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    Helium is monatomic and is called a "noble" gas for that reason. All gases in the same column below helium in the periodic table are noble gases.
     
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