Which statement best describes the composition of an atomic nucleus?

Which statement best describes the composition of an atomic nucleus?

• A. Protons Only
• B. Electrons Only
• C. Protons and Neutrons
• D. Electrons and Protons

Answer: (C)

In an atom, the dense center called the nucleus is made up of protons and neutrons. Protons have a positive charge, neutrons have no charge, and together they’re held tightly by the strong nuclear force. Electrons, which carry negative charge, orbit outside this center in regions called electron clouds, attracted to the nucleus but not part of it. That’s why the statement describing the nucleus as containing protons and neutrons is the best fit: it correctly names what physically sits inside the nucleus. Protons alone would omit neutrons, and electrons belong outside the nucleus, not within it. The numbers of protons and neutrons together influence mass and stability, while the number of protons alone determines the element’s identity.

In an atom, the dense center called the nucleus is made up of protons and neutrons. Protons have a positive charge, neutrons have no charge, and together they’re held tightly by the strong nuclear force. Electrons, which carry negative charge, orbit outside this center in regions called electron clouds, attracted to the nucleus but not part of it. That’s why the statement describing the nucleus as containing protons and neutrons is the best fit: it correctly names what physically sits inside the nucleus. Protons alone would omit neutrons, and electrons belong outside the nucleus, not within it. The numbers of protons and neutrons together influence mass and stability, while the number of protons alone determines the element’s identity.