How many electrons will metals generally have in their outer shell
0-4
4
1-3
4-7
8

1 - 3

Explanation:

- Look to see where metals are on the periodic table then look at what group they are in. The group tells you the number of valence electrons. Ex. 1A has one valence electron.

- Hope this helped! If you need a further explanation please let me know.

increased stability in the completion of fluorine's outer shell.