Question

The set which represents the isotope, isobar and isotone respectively is

• A. $\left(^{2}_{1}H, ^{3}_{1}H\right), \left(_{79}^{197}Au, _{80}^{198}Hg\right)$ and $\left(^{3}_{2}He, ^{3}_{1}H\right)$
• B. $\left(^{3}_{2}He, ^{1}_{1}H\right), \left(_{79}^{197}Au, _{80}^{198}Hg\right)$ and $\left(^{1}_{1}H, ^{3}_{1}H\right)$
• C. $\left(^{3}_{2}He, ^{3}_{1}H\right), \left(_{1}^{2}H, _{1}^{3}H\right)$ and $\left(_{79}^{197}Au, _{80}^{198}Hg\right)$
• D. $\left(^{2}_{1}H, ^{3}_{1}H\right), \left(_{2}^{3}He, _{1}^{3}H\right)$ and $\left(_{79}^{197}Au, _{80}^{198}Hg\right)$
• E. $ {{(}_{1}}{{H}^{1}}{{,}_{1}}{{H}^{3}}),{{(}_{79}}A{{u}^{197}}{{,}_{80}}H{{g}^{198}}) $ and $ {{(}_{2}}H{{e}^{3}}{{,}_{1}}{{H}^{3}}) $

Answer 1

Answer: (D)

Nuclides with same atomic number $Z$ but different mass number A are known as isotopes
Nuclides with same mass number $A$ but different atomic number $Z$ are known as isobars
Nuclides with same neutron number $N = (A-Z)$ but different atomic number $Z$ are known as isotones
$_{1}H^{2}$ and $_{1}H^{3}$ are isotopes
$_{2}He^{3}$ and $_{1}H^{3}$ are isobars
$_{79}Au^{197}$ and $_{80}Hg^{198} $ are isotones