noun
- positively charged particles found in the nucleus of an atom
Usage: physics; plural of proton
Examples
- Hydrogen atoms contain only one proton in their nucleus.
- The number of protons determines an element’s atomic number.
- Protons and neutrons make up the atomic nucleus.
- Scientists can accelerate protons to very high speeds.
- Each carbon atom has six protons.
- Protons carry a positive electrical charge.