Why is the nucleus of an atom positive in charge?

• A. Because it contains only neutrons, which are positively charged.
• B. Because it contains protons, which have a positive charge, and neutrons, which are neutral.
• C. Because the nucleus is surrounded by negatively charged particles.
• D. Because electrons in the nucleus give it a positive charge.

Answer: (B)

Verified step by step guidance

1. Recall the basic structure of an atom: it consists of a nucleus at the center and electrons surrounding it.
2. Understand that the nucleus contains two types of subatomic particles: protons and neutrons.
3. Know the charges of these particles: protons carry a positive charge, neutrons have no charge (neutral), and electrons carry a negative charge.
4. Since the nucleus contains protons (positive charge) and neutrons (neutral), the overall charge of the nucleus is positive due to the presence of protons.
5. Electrons are located outside the nucleus and do not affect the charge of the nucleus itself.