Classifying Particles and Antiparticles

Particles can be divided into 2 groups: leptons and hadrons.Leptons are fundamental particles and cannot be divided into smaller particles.Hadrons are made from fundamental particles called quarks.Hadrons interact through the strong interaction and leptons interact through the weak interaction.Leptons also interact through the gravitational attraction and electromagnetic interaction if charged.Hadrons interact through all four interactions: strong, weak, electromagnetic(if charged) and gravitational.There are six types of leptons, known as flavours, grouped in three generations. The first generation:

electron e−

electron neutrino νe

The second generation:

muon μ-

muon neutrino νμ

The third generation:

tau τ-

tau neutrino ντ