sentence2_structure: Particles in the gas state of matter<>do not experience<>any force of mutual attraction or repulsion
sentence1: 3) Ideal gas molecules exert neither an attractive force nor repulsive force on each other.
sentence2: Particles in the gas state of matter do not experience any force of mutual attraction or repulsion.
question: Particles in what state of matter do not experience any force of mutual attraction or repulsion?