VMMC VMMC Medical Solved Paper-2002

  • question_answer
    Which of the following has lowest ionization potential?

    A)  Sr

    B)  Sn                         

    C)  Sb                         

    D)         Xe

    Correct Answer: A

    Solution :

                                    As we move across the period from left to right, the size of atom decreases with increase in the atomic number and nucleus attract the electrons more tightly. Hence, more energy is required to pull out an electron from the outer most orbit. Therefore Sr has the lowest ionization potential.


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