To make an n-type semiconductor from silicon, one adds impurity atoms of
A) oxygen.
B) cobalt.
C) fluorine.
D) gallium.
E) arsenic.

Question

Quizplus · Accepted Answer

To make an n-type semiconductor, we need to add impurity atoms with more valence electrons than silicon (which has four valence electrons). Among the given options, only arsenic (As) has five valence electrons, making it the best choice for doping silicon to make it n-type.

To Make an N-Type Semiconductor from Silicon, One Adds Impurity