# How many valence electrons are in an atom of phosphorus?

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Hint:. The answer lies in the fact that the valence electron of an atom is nothing but the total number of electrons present in the outermost orbit of the shell of that particular atom and this fact gives the correct answer.

Atomic number of phosphorus is 15 with the symbol $P$ and the electronic configuration is $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{3}}$