Answer:
The size of an atomic nucleus is much smaller than the size of the entire atom. The nucleus is the central part of an atom, composed of protons and neutrons, and it contains nearly all of the atom's mass. The electrons, which are much smaller in mass, orbit the nucleus in electron shells.
Step-by-step explanation:
Typically, the diameter of an atomic nucleus is on the order of femtometers (1 femtometer = 1 x 10^-15 meters), while the diameter of the entire atom is on the order of angstroms (1 angstrom = 1 x 10^-10 meters). This size difference is substantial, with the nucleus being much smaller compared to the overall size of the atom. The electrons occupy a relatively large volume around the nucleus due to their cloud-like nature in electron orbitals.