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Molecular Polarity | 34 mins | 0 completed | Learn Summary |
Intermolecular Forces | 56 mins | 0 completed | Learn |
Phase Diagram | 18 mins | 0 completed | Learn Summary |
Heating and Cooling Curves | 37 mins | 0 completed | Learn Summary |
Unit Cell | 70 mins | 0 completed | Learn |
Clausius-Clapeyron Equation | 5 mins | 0 completed | Learn Summary |
Additional Practice |
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Intermolecular Forces and Physical Properties |
Atomic, Ionic, and Molecular Solids |
Explain how doping silicon with either phosphorus or gallium increases the electrical conductivity over that of pure silicon.
Silicon is a Group 4A element. It has 4 valence electrons. Pure silicon will use these 4 electrons to form a network with other silicon atoms as shown below:
All the electrons of Si are paired (through more networks of Si atoms). Hence, it is not very conductive at its pure state.
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