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Electron number density of the earth

  1. Jul 16, 2009 #1

    OB1

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    I'm trying to find the approximate electron number density of the earth - what physicists call n_{e} - but can't actually get the value anywhere. Does anyone know what the value of this constant is?
     
  2. jcsd
  3. Jul 20, 2009 #2
    you want to know how many electrons there are on the earth?
    seems a little obscure...
     
  4. Jul 20, 2009 #3

    OB1

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    No, it's a quantity used by physicists to calculate the MSW effect on weakly-interacting particles going through the earth. Anyways, it doesn't matter, I found it in the PDG Review.
     
  5. Jul 22, 2009 #4
    There is about 1 mole (6 x 10^23 electrons) per 2.1 grams of matter in the Earth. This is equivalent to 1 electron per proton. The Earth's mass is about 6 x 10^24 kilograms.
     
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