Which subatomic particle in an atom carries a negative charge?

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

Answer: (A)

Verified step by step guidance

1. Recall the three main subatomic particles in an atom: protons, neutrons, and electrons.
2. Understand the charge associated with each particle: protons carry a positive charge, neutrons have no charge (neutral), and electrons carry a negative charge.
3. Identify that the particle with a negative charge is the electron.
4. Note that a positron is not a subatomic particle found in a neutral atom; it is the antimatter counterpart of the electron and carries a positive charge.
5. Therefore, the subatomic particle in an atom that carries a negative charge is the electron.