None. the valence "rings" surround a an atomic nucleus.
Silicon has 4 valence electrons.
Chlorine has 7 valence electrons.
Alkali metals have one valence electron.
One. A hydrogen atom contains only one electron, and it is a valence electron.
one valence electrons
6 valence electrons
6 Valence Electrons
one electron
Rubidium has one valence electron in the 5s orbital.
Potassium has 1 valance electron.
Lead has 4 valence rings.
There are no valence electrons.