They have 3 valence electrons unless they are isotopes.
one valence electron
5 valence electrons.
Boron has 3 valence electrons.Boron has 3 valence electrons.
There are 8 valence electrons for neon.
4 electrons, 2 valence electrons
There are 2 valence electrons in cobalt.
The element chlorine has seven electrons in its valence shell.
The number of valence electrons is seven.
Helium has 2 valence electrons.
inert gases
3
5