Which of the following statements about subatomic particles is correct?

• A. Neutrons have no mass and do not contribute to the atomic mass.
• B. Protons and neutrons have approximately the same mass, but electrons are much lighter.
• C. Electrons and neutrons both carry a positive charge.
• D. Protons are found outside the nucleus, while electrons are found inside the nucleus.

Answer: (B)

Verified step by step guidance

1. Review the properties of subatomic particles: protons, neutrons, and electrons.
2. Recall that protons and neutrons are located in the nucleus of an atom, while electrons orbit around the nucleus.
3. Understand that protons carry a positive charge, electrons carry a negative charge, and neutrons have no charge (they are neutral).
4. Know that protons and neutrons have approximately the same mass, which is much greater than the mass of electrons.
5. Evaluate each statement based on these facts to identify the correct one.