The nucleus of an atom contains ____.

A) neutrons and protons
B) neutrons and electrons
C) protons and electrons
D) protons only
E) neutrons only

Neutrons

Subatomic particles with no electric charge, found in the nucleus of an atom, contributing to the atomic mass and stability of the atom.

Protons

Positively charged subatomic particles found in the nucleus of an atom, contributing to the atom's mass and defining the element.

Electrons

Particles smaller than atoms with a negative charge, essential for conducting electricity in solid substances.