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  3. Chemistry
  4. The element having greatest difference between its first and second ionization energies, is :

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Q. The element having greatest difference between its first and second ionization energies, is :

JEE MainJEE Main 2019Classification of Elements and Periodicity in Properties

Solution:

$K = 2, 8, 8 ,1$
After removal of one electron, second electron we have to remove from another shell, hence there is large difference between first and second ionization energies.