What are valence electrons and where are they located

Valence electrons are the number of electrons in the outermost shell.
ex.
Na has an electron arrangement of 2.8.1
In the outermost shell only has one electron,so the valence electron of Na is 1

They are a particle associated with atoms. Hope i helped:)

Decomposition is the cycle at which bacteria breaks down any organic material into the soil

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