What term describes a subatomic particle that has a positive charge and is found in the nucleus of an atom?

• A. Pole
• B. Proton
• C. Permeability
• D. Power

Answer: (B)

Identifying a positively charged subatomic particle that resides in the nucleus. In atoms, the nucleus contains protons and neutrons. A proton carries a positive electric charge and, together with neutrons (which have no charge), makes up the nucleus. The positive charge of protons also determines the atomic number, which defines what element the atom is. Neutrons contribute to the mass but not the charge. The nucleus is the center where these particles live, while electrons orbit around it due to the attraction to the positive charge of the nucleus. The other terms don’t describe a subatomic particle in the nucleus: pole refers to magnets, permeability is about how materials respond to magnetic fields, and power is a measure of energy transfer, not a particle.