Remember, Groups are the vertical columns and Periods are the horizontal rows.
But wait, there's nothing in that spot!
Here's the thing, when you are looking for a group that is between 1 and 8, you skip the middle elements (Known as the transition metals) and count.
You can see what I mean in this periodic table:
If you skip the middle elements and count across 3 columns and down 3 rows, you can see the element Aluminium(
Hope that makes sense!
(I know this can be quite confusing so you can ask me any questions in the comments if you are confused).