If a trivalent atom replaces a few silicon at | vedclass

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(C) In the $SiO_{2}$ structure,silicon is tetravalent $(Si^{4+})$. When a trivalent atom (e.g.,$B^{3+}$ or $Al^{3+}$) replaces a $Si$ atom,it creates

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(C) In the $SiO_{2}$ structure,silicon is tetravalent $(Si^{4+})$. When a trivalent atom (e.g.,$B^{3+}$ or $Al^{3+}$) replaces a $Si$ atom,it creates an electron deficiency or a 'hole' in the lattice.Although this hole allows for $p$-type semiconduction,the crystal as a whole remains electrically neutral because the total number of protons and electrons in the lattice remains balanced after the substitution.

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?

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