Question

which statement correctly describes the nucleus of the atom?
the nucleus of the atom contains the electrons.
the nucleus of the atom is mostly empty space.
the nucleus of the atom surrounds the center of the atom.
the nucleus of the atom contains most of the mass of an atom.

Explanation:

The nucleus of an atom contains protons and neutrons. Protons and neutrons have significant mass compared to electrons. Electrons are outside the nucleus. The nucleus is at the center of the atom and is dense, not mostly empty space.

Answer:

The nucleus of the atom contains most of the mass of an atom.