How do you determine the valence energy level when looking at a periodic table?

[miiizpiiink18]

How do you know how many valence energy level you have by just looking at the periodic table?
because you know that the group number tells the valence electrons right. :)
so what about valence energy level? :D

 

[windwitch]

Well, a valence energy level is the number of shells present, and if you know how many electrons are in each valence shell, you can determine the amount of shells there are.