Second Class of Fundamental Particles: Leptons
The Leptons are not quarks, but are members of the Elementary Particles. Particles are divided into two classes: quarks and leptons. You just read about the six types (or flavors) of quarks and there are six flavors of leptons as well. Three of the six are negatively charged while the remaining are neutral.
Flavor |
Mass (MeV) |
Electric Charge |
 |
0.51 |
- 1 |
 |
less than .46 X 10E-4 |
0 |
 |
105.6 |
- 1 |
 |
less than 5.0 |
0 |
 |
1,784 |
- 1 |
 |
less than 164 |
0 |