Describe the composition of the nucleus of an atom. A) It is composed of protons. B) It is composed of protons and neutrons. C) It is composed of protons and electrons. D) It is composed of protons, n

Describe the composition of the nucleus of an atom. A) It is composed of protons. B) It is composed of protons and neutrons. C) It is composed of protons and electrons. D) It is composed of protons, neutrons, and electrons.