''particles have forces of attraction between them" me write a short paragraph about this

If you are talking about atoms and molecules, Heres what I would write. 

Particles have an attraction between each other because two objects of the same mass will share a center of gravity that is exactly the midpoint between the two objects, so this means that neither of the particles will have more attraction then each other. So this also means that they would orbit each other. An orbit is a way of "circular falling."

I hope that this helps! 

Ithink its solid. hope this