Question

What do the columns of the Periodic Table tell us?

Answer 1

Answer:

The columns of the table represent groups, or families, of elements. The elements in a group often look and behave similarly, because they have the same number of electrons in their outermost shell,  the face they show to the world.

Explanation:

Answer 2

Answer:

The columns tell you how many electrons are on the outest most shell of the atom.