Physics - Solid State Physics - Band theory of solids - Why Do Metals Shine and Diamonds Don't Conduct?

Everyday observations that need quantum mechanics to explain. Q1: 'Why do metals conduct electricity but glass doesn't?' A) Metals have special atoms, B) Their energy levels form bands with different gaps. Answer: B! Q2: 'Why is copper shiny and wood isn't?' A) Surface smoothness only, B) Free elect