Which of the following particles has a positive charge?

• A. Electron
• B. Neutron
• C. Proton
• D. Positron

Answer: (C)

The particle with a positive charge among the given options is the proton. Protons are subatomic particles found in the nucleus of an atom and carry a positive electric charge equal in magnitude but opposite in sign to that of an electron's negative charge. This positive charge is fundamental to the structure of atoms, as it helps to hold the negatively charged electrons in orbit around the nucleus, creating a stable atomic structure.

In contrast, electrons carry a negative charge, and neutrons are electrically neutral, meaning they have no charge at all. A positron, although it carries a positive charge, is not considered a fundamental particle like the proton; rather, it is the antiparticle of the electron. Thus, the proton is the primary particle known for its positive charge in the context of atomic structure.