Question

A sample of uranium $U$ contains

• A. more of isotope ${ }_{92}^{235} U$ and less of ${ }_{92}^{238} U$
• B. more of impurities alongwith a small amount of ${ }_{92}^{238} U$
• C. equal amounts of isotopes ${ }_{92}^{235} U$ and ${ }_{92}^{238} U$
• D. more of isotope ${ }_{92}^{238} U$ and less of ${ }_{92}^{235} U$

Answer 1

Answer: (D)

Uranium are obtained naturally from earth contains only a very small part $(0.01 \%)$ of $U^{235}$ and remaining $(99.9 \%)$ is $U ^{238}$.