Question

which argument best explains the charge of an atomic nucleus?
an atomic nucleus is positively charged because it is composed of neutrons.
an atomic nucleus is positively charged because it is composed of protons.
an atomic nucleus is negatively charged because it is composed of electrons.
an atomic nucleus is negatively charged because it is composed of neutrons.

Explanation:

To determine the correct argument, we analyze the components of an atomic nucleus and their charges:

• Neutrons have no charge (neutral), so options involving neutrons causing a charge (positive or negative) are incorrect.
• Electrons are not part of the nucleus (they orbit around it), so the option about electrons in the nucleus is wrong.
• Protons have a positive charge, and the nucleus is composed of protons (and neutrons, which are neutral). Thus, the nucleus is positively charged because of the protons.

Answer:

B. An atomic nucleus is positively charged because it is composed of protons.