Question

Which types of matter are made of atoms?

A. solids only

B. solids and liquids only

C. plasma only

D. solids, liquids, gases and plasma

Answer 1

The answer is D. Plasmas are atoms that have been ionized due to high temperatures and pressures. Even though the ionization takes place, the constituent particles are not necessarily free particles and therefore are still associated with the atom. This incomplete dissociation is what defines the substance as a plasma.