Help with Chemistry homework!?

Question

Compared to the entire atom, the nucleus of the atom is

a- larger and contains most of the atom's mass
b- smaller and contains little of the atom's mass
c- smaller and contains most of the atom's mass
d- larger and contains little of the atom's mass

thanks in advance =)

Answer 1

[Answer: C]--> smaller and contains most of the atom's mass

An atom is basically the nucleus and the "cloud" of electrons around it. Therefore, the nucleus must be smaller compared to the entire atom. It contains most of the atom's mass because the protons and neutrons within the nucleus far outweigh the mass of the electrons.