Question

which statement describes an atomic nucleus?
an atomic nucleus is negatively charged.
an atomic nucleus has no electrical charge.
an atomic nucleus consists of mostly empty space.
an atomic nucleus contains most of the atoms mass.

Explanation:

An atomic nucleus contains protons and neutrons. Protons are positively - charged and neutrons are neutral. Since the mass of an electron is much smaller than that of a proton or neutron, the nucleus contains most of the atom's mass. It is positively charged, not negatively charged or neutral. Also, the space around the nucleus is mostly empty space, not the nucleus itself.

Answer:

An atomic nucleus contains most of the atom's mass.