Sodium has 1 valence electron in the 3s sublevel.
none
one
The entire Group 2A has 2 valence electrons; this includes sodium and calcium.
There are 27 valance electrons.
2 valance electrons
Iodine has 7 valance electrons
Lithium (Li) has 1 valence electron. It is in the same 'family' as Sodium (Na) and Potassium (K)
By looking at the group number you can tell how many valance electrons there are ex: Group 1= 1 valance electrons Group 2-12= 2 valance electrons Group 13= 3 valance electrons Group 14= 4 valance electrons Group 15= 5 valance electrons Group 16= 6 valance electrons Group 17= 7 valance electrons Group 18= 8 valance electrons
The valance electrons.
The element that fits these criteria is sulfur. Sulfur has 6 valence electrons (more than oxygen with 6, fewer than neon with 8), 16 protons (more than sodium with 11, fewer than argon with 18).
They have different numbers of valance electrons
2 valance electrons