Strange that your comment is being downvoted, because it's a good summary of the article! For instance size of hydrogen atom is inversely proportional to the m

Strange that your comment is being downvoted, because it's a good summary of the article! For instance size of hydrogen atom is inversely proportional to the mass of electron [1], so with heavier electrons, sizes of atoms shrink. And in general in units where planks constant and speed of light are equal to one, mass is measured in 1/length. [1] https://en.m.wikipedia.org/wiki/Bohr_radius https://en.m.wikipedia.org/wiki/Bohr_radius