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CMC Medical CMC-Medical Ludhiana Solved Paper-2009

  • question_answer
    The number of \[\alpha \text{-}\]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 \[\alpha \text{-}\]particles\[=\frac{change\text{ }in\text{ }atomic\text{ }mass}{4}\]\[=\frac{218-206}{4}=\frac{12}{4}=3\]


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