Question
Question: Masses of two isobars <sub>29</sub>Cu<sup>64</sup> and <sub>30</sub>Zn<sup>64</sup> are 63.9298 u an...
Masses of two isobars 29Cu64 and 30Zn64 are 63.9298 u and 63.9292 u respectively. It can be concluded from these data that
A
Both the isobars are stable
B
Zn64 is radioactive decaying to Cu64 through β - decay.
C
Cu64is radioactive decaying to Zn64 through γ-decay.
D
Cu64 is radioactive decaying to Zn64 through β-decay.
Answer
Cu64 is radioactive decaying to Zn64 through β-decay.
Explanation
Solution
Cu64 is radioactive after β-decay its atomic number increases by one and its mass number doesn’t change.
∴ it decays to Zn64