Heavy molecules such as cfc at higher altitudes
According to present knowledge, it is generally considered as follows:
CFCs reach the stratosphere because the Earth’s atmosphere is always in motion and mixes the chemicals added into it. Gases such as CFCs that do not dissolve in water and that are relatively unreactive in the lower atmosphere are mixed relatively quickly and therefore reach the stratosphere regardless of their weight.
Can this phenomenon be explained better by considering both gravitational repulsion and attraction forces?