One(1)
Francium has one valence electron.
4
6
Boron has 3 valence electrons.
valence electrons
One. A hydrogen atom contains only one electron, and it is a valence electron.
A hydrogen atom has 1 valence electron.
It's called a valence electron, and there's 1 for a hydrogen atom
Valence electrons. They exist in the atom's valence shell.
Hydrogen chloride (HCl) has 7 valence electrons. Hydrogen contributes 1 valence electron and chlorine contributes 7 valence electrons.
Valence electons
Only one valence electron.