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(C) Germanium is a group $14$ element with $4$ valence electrons.Antimony $(Sb)$ is a group $15$ element,which means it has $5$ valence electrons.When

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The material obtained will be $N$-type germanium which has more electrons than holes at room temperature.

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(C) Germanium is a group $14$ element with $4$ valence electrons.Antimony $(Sb)$ is a group $15$ element,which means it has $5$ valence electrons.When antimony is added to germanium as a dopant,$4$ of its valence electrons form covalent bonds with the surrounding germanium atoms.The $5$th electron remains loosely bound and becomes a free charge carrier.Since the added impurity provides extra electrons,it acts as a donor impurity,resulting in an $N$-type semiconductor.In an $N$-type semiconductor,the number of free electrons is significantly greater than the number of holes at room temperature.

The electronic configuration of germanium is $2, 8, 18, 4$. To make it an extrinsic semiconductor,a small quantity of antimony is added. What is the nature of the resulting material?

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