Is the molecule shown polar or nonpolar f-o-f

How are isotopes of the same chemical element alike? how are they different?

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.