Electron number density of the earth

[OB1]

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?

 

[nooma]

you want to know how many electrons there are on the earth?
seems a little obscure...

 

[OB1]

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.

 

[Bob S]

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.