Found in the nucleus and has no charge?

• A. Protons
• B. Neutrons
• C. Electrons
• D. Positrons

Answer: (B)

Neutrons are the particles that fit both criteria here. In the nucleus you find protons and neutrons; protons carry a positive charge, while neutrons have no electric charge, making them neutral. Electrons are outside the nucleus and carry a negative charge, so they don’t meet the “located in the nucleus” part. Positrons are positively charged antimatter particles and aren’t the normal constituents of the nucleus in ordinary matter. So the only particle that is both in the nucleus and uncharged is the neutron.