Question

3.what is true about elements that are in the same column (group/family)?

Explanation:

Elements in the same column (group/family) in the periodic table have similar chemical properties. This is because they have the same number of valence electrons. Valence electrons are the electrons in the outermost shell of an atom and are responsible for the atom's chemical behavior. For example, the alkali metals (Group 1) all have one valence electron and are highly reactive.

Answer:

Elements in the same column (group/family) have similar chemical properties due to having the same number of valence electrons.