Silicon has four electrons in its outer energy level,gallium has three.Adding small amounts of gallium to pure silicon
A)destroys the ability of the silicon to act as a semiconductor.
B)provides the basis for using the silicon as a fuel cell.
C)creates a p-type semiconductor.
D)creates an n-type semiconductor.

Question

Quizplus · Accepted Answer

Adding gallium, which has three electrons in its outer energy level, to silicon introduces "holes" or positive charge carriers in the silicon's crystal lattice, creating a p-type semiconductor. This is because the gallium atoms accept electrons, leading to a deficiency of electrons or an abundance of "holes" in the structure.

Silicon Has Four Electrons in Its Outer Energy Level,gallium Has