What isotope and element are used in most nuclear power plants?

A) U-238
B) U-235
C) Pu-242
D) Pu-244

U-238

U-238 denotes uranium-238, the most abundant isotope of uranium found in nature, known for its long half-life and use as a starting material in the production of nuclear fuel and atomic weapons.

U-235

An isotope of Uranium with a unique capability for nuclear reactions, particularly used in nuclear reactors and weapons.

Pu-242

A radioactive isotope of plutonium, with a half-life of over 373,000 years, significant in nuclear science and waste management.