Which statements describe the Rutherford atomic model? Check all that apply. It defined the nucleus for the first time.

Electrons exist only in energy levels.

Electrons orbit the nucleus.

Electrons exist in any location in the atom.

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 drawing represents the movement of particles in a substance. what changes of state can this substance undergo

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.