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free electrons ELEC

free electron PHYS

free electron PHYS

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After a while, free electrons recombine with those hydrogen ions. en.wikipedia.org

It is the ratio of the abundance of free electrons to the total abundance of hydrogen (both neutral and ionized). en.wikipedia.org

The mixture of ions and free electrons in the plasma is highly conductive, resulting in a sharp drop in the gap's electrical resistance. en.wikipedia.org

These photons in turn produce high energy free electrons by Compton scattering at altitudes between (roughly) 20 and 40 km. en.wikipedia.org

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