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 $U^{238}$.