Question

WILL GIVE METAL: Why do atoms have relatively the same size even though they may have widely different masses?

Answer 1

The difference in mass depends on the number of neutrons in the nucleus. The nucleus represents a very small portion of the overall size of an atom, so most of the atom's size isn't affectedby a change in the number of neutrons in the nucleus.

Answer 2

thank youuu! @ghuczek