Newton tells us that gravity exists at any distance with any mass.
But we have no expériment to show that gravity exists at atomic scale:
Earth attracts a single atom. Does a single atom attract earth ?
When light particles/elements gather to form a star, this cannot be due to gravity, kuz it's so weak or perhaps inexistant at atomic scale ?.... There must be other forces to start the formation. Gravity starts from a certain size to finish the job.
Do you think that gravity exists at atomic scale, or it starts interaction only when mass reaches a certain size ?