The Period Chart of Matter and 
The Generations of Matter

Both quarks and leptons exist in 3 distinct generations of matter particles. Each generation heavier than previous

First generation:  Second Generation   Third generation 
all visible matter in the universe  cosmic rays except 
decay products of higher mass particles particles are unstable


 All observed particle explained by: 
  • 6 types of leptons 



    6 types of quarks


+2/3 X   3

-1/3 X  3