Quantum Particles: Leptons

But the electron is merely one member of a group of particles called leptons.  The term lepton comes from the Greek and means “small,” or “thin” and refers to the extremely low mass of leptons.[1]  The electron, for example, is 1800 times less massive than a proton.  

Quantum Particles: An Introduction

Quantum physics deals with how the universe behaves at very small scales – on the level of atoms and smaller.  And it’s weird: very weird.  Particles that are smaller than atoms do not behave in exactly the same way as the much larger objects to which we are accustomed.  This makes quantum physics one of the most intriguing areas of research, and one which declares the glory and majesty of the Lord.