Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: An n-type (negative-type) semiconductor consists of silicon and an element such as phosphorus that gives the silicon crystal extra electrons. You can see this in the Figure above . An n-type semiconductor is like the negative terminal of a battery. Answer: n-type
A:
Silicon with an element that gives it extra electrons is which type of semiconductor?