Which of the following is not part of the kinetic molecular theory?

Question

a
The average kinetic energy of the particles is directly proportional to the absolute temperature.
b
Gas particles have most of their mass concentrated in the nucleus of the atom.
c
The moving particles undergo perfectly elastic collisions with the walls of the container.
d
The forces of attraction and repulsion between the particles are insignificant.

Answer 1

The statement that is not part of the kinetic molecular theory is:

b. Gas particles have most of their mass concentrated in the nucleus of the atom.

The kinetic molecular theory primarily focuses on the behavior of gas particles, their motion, and their interactions, particularly in terms of collision and kinetic energy. It does not concern itself with the mass distribution of particles, such as the concentration of mass in the nucleus of an atom.