Question

The set which repesents the isotope , isobar and isotone respectively is
A. `(._1^2H, ._1^3H),(._79^197Au, ._80^198Hg) and (._2^3He, ._1^2H)`
B. `(._2^3H, ._1^1H),(._79^197Au, ._80^198Hg) and (._1^1He, ._1^3H)`
C. `(._2^3H, ._1^3H),(._1^2H, ._1^2H) and( ._79^197Au, ._80^198Hg)`
D. `(._1^2H, ._1^3H),(._2^3He, ._1^3H) and( ._79^197Au, ._80^198Hg)`

Answer 1

Correct 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.
`._1H^2` and `._1H^3` are isotopes
`._2He^3` and `._1H^3` are isobars.
`._79Au^197` and `._80Hg^198` are isotones.