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11 and 12
11. Match the given substances to the following band dia- grams. Give your answer as ABCD,DABC, going from left to right in the figure. A. diamond B. sodium metal C. germanium doped with aluminum D. germanium Tries 0/99 12. Now put the compounds above in order of increasing electrical conductivity (from worst conductor to best). Give your answer as ABCD,DABC.,.. ermanium are both semiconducting el
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In metals valence band 4 conduction bond is ovet lobped dhus five high conduectivity to matale In insulatots o non-conductosts conduction f valence bands ae fast apastt. When gegmanium is doped人Lith aluminium, it cheats a accepto level above the valence band, thus iving a p-type semiconductoft □ So dium Germaniun Gestmanium doped with Aluminium Diamond ap bet人Leen valence band conduction band lesses is the conductivi 12) 0Mdest of incseasing electsical co ndue tivity

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