Which class of elements will contain both solids and gases at room temperature?

inner transition metals

metals

metalloids

nonmetals

The nonmetals, as s class of elements contains both solids and gases at room temperature.

Some gases classed as nonmetals are : hydrogen, helium, oxygen, nitrogen, fluorine, neon, or radon and many others. An example of a solid that is a nonmetal is sulfur.

The class of non metal are the one which will contain both solid and gases at room temperature. Example in halogen iodine is always in solid state while chlorine and flurorine are gases at room temperature. Metals, and inner transition metals are solids at are all solids at room temperature.