
Concept explainers
Interpretation:
The final product must be identified when 119Pt197 undergoes beta decay and the daughter isotope so formed also undergoes beta decay.
Concept introduction:
A beta particle can be represented as -1e0.
There is no change of mass number of daughter isotope when beta decay takes place. But atomic number increases by one unit.

Answer to Problem 12E
The final product will be 121Tl197.
Explanation of Solution
The beta decay of the given nuclear reaction can be represented as follows.
119Pt197=120X197 + -1e0
120X197=121Tl197 + -1e0
After each beta decay there is one unit increase in atomic number but mass number remains the same. As the starting nuclide has atomic number 119 so after two consecutive beta decay the atomic number of final product will be 121. Mass number will be same as starting nuclide which is 197.
Thus, the final product will be 121Tl197.
Chapter U1 Solutions
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