In the atomic model, an atom is made up of a central mass, with much smaller particles moving around it. What are the names of the central mass and the orbiting particles?
- Acentral mass: neutron; orbiting particles: $\alpha$-particles
- Bcentral mass: neutron; orbiting particles: electrons
- Ccentral mass: nucleus; orbiting particles: $\alpha$-particles
- Dcentral mass: nucleus; orbiting particles: electrons