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

  • Option 1)

    Ca

  • Option 2)

    Sc

  • Option 3)

    Ba

  • Option 4)

    K

 

Answers (1)

K is from first group 

Mg,Sr,Sc are from second group .

K , after IE_{1} it will reach Noble gas configuration and its IE_{2} will be very high,

   IE_{2}> > > IE_{1}


Option 1)

Ca

Option 2)

Sc

Option 3)

Ba

Option 4)

K

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