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AFMC AFMC Solved Paper-2008

  • question_answer
    The number of \[\alpha -\]particles emitted by  \[_{84}R{{a}^{218}}{{\xrightarrow{{}}}_{82}}P{{b}^{206}}\] is

    A)  3                                            

    B)  4

    C)  6                                            

    D)  2

    Correct Answer: A

    Solution :

                     Number of \[\alpha -\]particles \[\text{= }\frac{\text{Change in atomic mass}}{\text{4}}\] \[=\frac{218-206}{4}=\frac{12}{4}=3\]


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