Halogens are group 17 elements. They have 7 valence electrons.
A halogen is located in group 17 of the periodic table, so the electron configuration for the valance electron would be ns2np5 (n=energy level). So all halogens have 7 valance electrons.
There are 27 valance electrons.
2 valance electrons
Iodine has 7 valance electrons
They have different numbers of valance electrons
6 valence electrons
6 valence electrons
there are six
Two.
3
hundereds
2