Editing Pauli exclusion principle (section)

=== Solid state properties ===
In [[Electrical conductor|conductor]]s and [[semiconductor]]s, there are very large numbers of [[molecular orbital]]s which effectively form a continuous [[electronic band structure|band structure]] of [[energy level]]s. In strong conductors ([[metal]]s) electrons are so [[Degenerate energy level|degenerate]] that they cannot even contribute much to the [[thermal capacity]] of a metal.<ref name=Kittel2005>{{citation|last=Kittel|first=Charles|title=[[Introduction to Solid State Physics]]|publisher=John Wiley & Sons, Inc.|year=2005|location=USA|edition=8th|isbn=978-0-471-41526-8}}</ref>{{rp|133–147}} Many mechanical, electrical, magnetic, optical and chemical properties of solids are the direct consequence of Pauli exclusion.