A) \[6\alpha \]and \[8\beta \]
B) \[8\alpha \] and \[6\beta \]
C) \[6\alpha \] and \[4\beta \]
D) \[4\beta \] and \[6\beta \]
Correct Answer: B
Solution :
If a radioactive element emitted one a-particle, its atomic number decreases by two unit and mass number decreases by four units and if a radioactive element emitted one p-particle, its atomic number increases by one unit and mass number doesn't changes. \[_{92}{{U}^{238}}{{\xrightarrow{-8\alpha }}_{76}}{{X}^{206}}{{\xrightarrow{-6\beta }}_{82}}P{{b}^{206}}\]
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