Q. With reference to isotopes of Uranium, consider the following statements:- U-238 is the most abundant isotope of uranium and is found in nature in much greater quantities than U-235.
- Only U-235 is fissile and can sustain a chain reaction, but U-238 is fertile.
Select the correct option from the codes given below:
Answer:
Both 1 & 2
Notes: U-238 is the most abundant uranium isotope, constituting about 99.3% of natural uranium, while U-235 makes up roughly 0.7%. U-235 is fissile and can sustain a chain reaction. U-238 is classified as fertile; it cannot sustain a chain reaction but can be converted into fissile Plutonium-239 by neutron capture.