Answer:
C. Smaller than an atom
Step-by-step explanation:
"SUB"original meaning: «under, inferior, smaller»
In Physics and similar areas, subatomic particles refer to tiny particles, that is, particles smaller than the atom. The essential ones are: protons, neutrons and electrons.
Dozens of these particles are known to exist, such as:
- Positrons
- Neutrinos
- Mesons
- Quarks
- Leptons...