Silicon crystals are semiconductors. Which of the following is a correct reason for the increase in the conductivity of Si crystals when a small fraction of Si atoms are replaced with those of a different element?

A: P atoms introduce additional mobile negative charges.
B: P atoms introduce additional mobile positive charges.
C: Ge atoms have more electrons than Si atoms have.
D: Ge atoms are much smaller than Si atoms.

Question

03-10-2021
Chemistry

Answered

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Silicon crystals are semiconductors. Which of the following is a correct reason for the increase in the conductivity of Si crystals when a small fraction of Si atoms are replaced with those of a different element?

A: P atoms introduce additional mobile negative charges.
B: P atoms introduce additional mobile positive charges.
C: Ge atoms have more electrons than Si atoms have.
D: Ge atoms are much smaller than Si atoms.

Sagot :

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