6. Neon has 10 electrons - 2 in the inner shell and 8 in the outer shell. This arrangement of 8 electrons in the outer shell is extremely stable and makes neon inert, with a valence of zero. Sodium has 11 electrons - 2
in the first shell, 8 in the next shell, and I in the outer shell. Fluorine has 9 electrons - 2 in the first shell
and 7 in the outer shell. How could sodium and fluorine from a compound in which both elements would
be like neon with 8 electrons in the outer shell?