Step-by-step explanation:
Valence electrons are defined as the electrons which are present in the outermost shell of an atom.
The number of valence electrons in a particular group will be equal to the group number.
Number of valence electrons = Group number
The given table follows:
Group Most likely ionic charge No. of valence electrons
I +1 1
II +2 2
III +3 3
IV +4 or -4 4
V -3 5
VI -2 6
VII -1 7
VIII 0 8