You're asking about which chemical families (or groups on the periodic table) have elements that are solid, liquid, and gaseous at room temperature.

The answer is none. Here's why:

* Solids: Most elements at room temperature are solids. Think of metals like iron, gold, and silver.

* Liquids: Only two elements are liquid at room temperature: Mercury (Hg) and Bromine (Br).

* Gases: The majority of elements that are not solids at room temperature are gases. Examples include oxygen (O), nitrogen (N), and chlorine (Cl).

Therefore, no single family on the periodic table will have all three states of matter (solid, liquid, and gas) present at room temperature.