Electrical Engineering XYZ MCQs
Which of the following is trivalent impurity:
- Boron
- Antimony
- Silicon
- None of the above
Correct answer: 1. Boron
Explanation: Trivalent impurities refer to impurities that have three valence electrons. Valence electrons are the electrons in the outermost shell of an atom, which are involved in bonding.
Boron is a trivalent impurity because it has three valence electrons. It typically substitutes for silicon in silicon crystal lattices, making it an important dopant in semiconductor technology.