Why is phosphours doped silicon a semi-conductor?

Why phosphorus doped with silicon is a semiconductor?

Give reason : (a) Why is Frenkel defect found in AgCl ? (b) What is the difference between silicon doped with phosphorus and doped with gallium semi-conductors ?

Give reason : (a) Why is Frenkel defect found in AgCl ? (b) What is the difference between silicon doped with phosphorus and doped with gallium semi-conductors ?

Give reason : (a) Why is Frenkel defect found in AgCl ? (b) What is the difference between silicon doped with phosphorus and doped with gallium semi-conductors ?

How will you account for the fact that silicon is an insulator but silicond doped with phosphorus acts as semi-conductor ?

Account the following : Silicon is an insulator but silicon doped with phosphorus acts as a semiconductor.

Account for the Silicon is an insulator but silicon doped with phosphorus acts as a semiconductor.