U-235, the Isotope of Uranium Commonly Used in Nuclear Power

Multiple Choice

U-235, the isotope of uranium commonly used in nuclear power plants, is

A) the most common of the naturally occurring isotopes of uranium.
B) heavier than the other well-known isotope of uranium.
C) rare even in uranium-rich deposits and must be enriched to use as fuel.
D) only found in quartz veins in granite plutons.