Identify the number of subatomic particles in an atom of sodium with a mass number of 23.

• A. 12 protons, 13 electrons, 12 neutrons
• B. 11 protons, 10 electrons, 14 neutrons
• C. 10 protons, 12 electrons, 14 neutrons
• D. 11 protons, 11 electrons, 12 neutrons

Answer: (D)