Which low energy state of condensed matter is characterized by structural rigitly and resistance to changes of shape or volume

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

In 2002, the rare earth elements mine in mountain pass, california was closed because