Which statement describes the particles of an ideal gas?
(1) The particles move in well-defined, circular paths.
(2) When the particles collide, energy is lost.
(3) There are forces of attraction between the particles.
(4) The volume of the particles is negligible.
The answer is (4) the volume of the particles is negligible. The property of an ideal gas is that the volume of particles and forces of attraction between the particles are negligible.
