9. solid inorganie materials are commonly classified as conductors, semi-conducturs or insulators as determined by their bandgap. carbon has many allotropes suc

9. Solid inorganie materials are commonly classified as conductors, semi-conducturs or insulators as determined by their bandgap. Carbon has many allotropes such as diamond, graphite, carbon nanotubes and grapheme with distinct bandgaps. Considering the properties of diamond, what should be its bandgap. (a) 7.0 eV (b) 1.0 eV ()0.01 eV (d) 0 eV