Pauli Exclusion Principle

Pauli Exclusion Principle

1. It Affects all families of the "fermions"

   • The Fermions are particles with half-integer spin
     • They can be Quarks , Electrons and Neutrinos
   • Enunciated by Ernst Pauli in 1925
     • This establishes that two electrons in an atom can´t have identical quantum numbers
       • Applications
         • No two fermions can exist in identical energy quantum states
           • Applied to atoms
             • NO two electrons in an atom can have identical quantum numbers. This guides the modelign of the buildup of the Periodic Table
           • Applied to solids
             • NO two electrons in a solid can have identical energy states . This leads to the concept of the Fermi Level in the band theory of solids