What are some examples of valence electrons?
These electrons are found in the s and p orbitals of the highest energy level (row of the periodic table) for the element.
Na - Sodium
Sodium has 1 valence electron from the 3s orbital
P - Phosphorus
Phosphorus has 5 valence electrons 2 from the 3s and 3 from the 3p
Fe - Iron
Iron has 2 valence electrons from the 4s
Br - Bromine
Bromine has 7 valence electrons 2 from the 4s and 5 from the 4p
you can count the electrons in the outermost shell
I hope this was helpful.