Which of the following best summarizes the quantum model of atoms? a. electrons reside in known positions in fixed orbits around the nucleus. b. electrons are waves that travel in known paths around the protons. c. electrons display some properties of waves and while they reside outside of the nucleus, their positions cannot be known with certainty.

option (b)

Explanation:

Let the electric field is given by E.

mass of proton = mp

mass of electron = me

acceleration of proton = ap

acceleration of electron = ae

Charge on both the particle is same but opposite in nature.

The force on proton = q E

The force on electron = - q E

acceleration of proton, ap = q E / mp

acceleration of electron, ae = - q E / me

We observe that the force is same in magnitude but opposite in direction, acceleration is also different and opposite in direction.