In the atomic model, an atom is made up of a central mass with much smaller particles moving around it. What is the name of the central mass and what are the orbiting particles called?
- 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