Protons — Structure & Properties

Smaller, because there are less protons, and therefore a smaller size.

Smaller, because there are less electrons, and therefore a smaller size.

The same size, because protons don't take up any significant space in an atom compared to how far away the electrons are.

Larger, because protons attract electrons, and the more protons there are in the middle of an atom, the closer to the middle the electrons will orbit.