Question

The natural relative abundance of isotopes of hydrogen is

• A. ${ }_{1}^{1} H-99.985 \% ;{ }_{1}^{2} D -0.015 \%$
• B. $ _{1}^{1} H =99.985 \% ;{ }_{1}^{2} D =0.015 \% ;{ }_{1}^{3} T =10^{-16} \%$
• C. ${ }_{1}^{1} H =99.100 \% ;{ }_{1}^{2} D =0.900 \%$
• D. ${ }_{1}^{1} H =99.900 \% ;{ }_{1}^{2} D =0.10 \% ;{ }_{1}^{3} T =10^{-15} \%$

Answer 1

Answer: (B)

Isotope of hydrogen is hydrogen $-2$ (also called ) deuterium abbreviated as $D$.

Which contains one proton and one neutron and has a natural abundance of only $0.015 \%$.

${ }_{1}^{1} H =99.985 \% ;{ }_{1}^{2} D =0.015 \% ;{ }_{1}^{3} T =10^{-16} \%$