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  3. RAJASTHAN PMT

RAJASTHAN PMT Rajasthan - PMT Solved Paper-1995

  • question_answer
    Dipositive ion of an element has the electronic configuration \[2,8,10\]. Atomic number of the element is:

    A)  \[22\]                  

    B)         \[24\]

    C)  \[25\]                  

    D)         \[28\]

    Correct Answer: A

    Solution :

    Because electronic configuration is\[2,8,10\]. So that atomic number is 20 but due to dispositive ion atomic number is \[20+2=22\].


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