sentence2_structure: Particles in the gas state of matter<>do not experience<>any force of mutual attraction or repulsion
sentence1: gas A state of matter that possesses particles that that are free to move about with no forces holding them together.
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?