The Main Difference That Determines If a Substance Will Be

question 5

Multiple Choice

The main difference that determines if a substance will be an insulator or a semiconductor is:

• A) trace impurities in the semiconductor.
• B) the size of the energy gap between bands.
• C) the number of valence electrons.
• D) the atomic weight of the species.
• E) none of these

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Definitions:

Vienna

The capital city of Austria, known for its cultural contributions, historical significance in European politics, and as the host of major international diplomatic events.

Cuban Missile Crisis

A 13-day confrontation in October 1962 between the United States and the Soviet Union over Soviet ballistic missiles deployed in Cuba, marking the peak of Cold War tensions.

Hotline

A direct and immediate telephone line for emergency communication or for obtaining information.

Kremlin

A fortified complex in the heart of Moscow, Russia, historically the residence of the tsars and now the official residence of the President of Russia.