none
one
Sodium has 1 valence electron in the 3s sublevel.
2 valance electrons
There are 27 valance electrons.
Iodine has 7 valance electrons
The entire Group 2A has 2 valence electrons; this includes sodium and calcium.
Lithium (Li) has 1 valence electron. It is in the same 'family' as Sodium (Na) and Potassium (K)
They have different numbers of valance electrons
6 valence electrons
6 valence electrons
there are six
Two.