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JCECE Engineering JCECE Engineering Solved Paper-2009

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

    A) \[3\]                                     

    B) \[4\]

    C)  \[6\]                                    

    D)  \[2\]

    Correct Answer: A

    Solution :

    Number of a-particles\[=\frac{change\,\,in\,\,atomic\,\,mass}{4}\]         \[=\frac{218-206}{4}=\frac{12}{4}=3\]


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