If a trivalent atom replaces a few silicon atoms in the three-dimensional network of silicon dioxide,what would be the type of charge on the overall structure?

Calculate the percentage of metal deficiency defect in $Fe_{0.94}O$.

Identify the defect that develops when the ratio of number of cations to anions becomes different from that indicated by its chemical formula.

If $NaCl$ is doped with $10^{-3} \, mol \% \, SrCl_2$,what will be the concentration of cation vacancies?

$A$ silicon specimen is made into a $p-$type semiconductor by doping,on an average,one indium atom per $5 \times 10^7$ silicon atoms. If the number density of atoms in the silicon specimen is $5 \times 10^{28} \ \text{atoms} \ m^{-3}$,then the number of acceptor atoms in silicon per cubic centimeter will be

In a solid lattice,the cation has left a lattice site and is located at an interstitial position. The lattice defect is: