Semiconductors,such as the Element Silicon,may Be Used in Cells That

Multiple Choice

Semiconductors,such as the element silicon,may be used in cells that convert solar radiation to electricity.One of the major difficulties encountered in using silicon is that it

A) is one of the rarest of all elements and therefore difficult to find on earth.
B) is expensive to produce large quantities of extremely pure silicon.
C) quickly evaporates when isolated in a pure state.
D) is the most active of all the elements,so it cannot be prepared in a pure state.