Multiple choice general knowledge science & technology

In the n-type doping, atoms that have how many more valence electron than the semiconductor atom are added to the semiconductor?

  1. four

  2. three

  3. two

  4. one
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In n-type doping, donor atoms with one MORE valence electron than the semiconductor atom are added. For example, in silicon (4 valence electrons), phosphorus (5 valence electrons) is added as a donor. The extra electron becomes free to conduct current, creating negative charge carriers. This is why it's called 'n-type' (negative-type).

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