Question

the contains the larger subatomic particles, while the smaller particles zoom around on the outside. electron matter nucleus

Explanation:

To solve this, we recall atomic structure: the nucleus (containing protons and neutrons, larger subatomic particles) is at the center, and electrons (smaller) orbit outside. "Matter" is a general term for substances, not a subatomic - particle - containing structure. "Electron" is the small particle outside. So the nucleus is the correct choice.

Answer:

nucleus