The decreasing order of second ionization energy of K, Ca and Ba is :
The decreasing order of second ionization energy of K, Ca and Ba is :
Option 1 -
K > Ca > Ba
Option 2 -
Ca > Ba > K
Option 3 -
Ba > K > Ca
Option 4 -
K > Ba > Ca
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1 Answer
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Correct Option - 1
Detailed Solution:The second ionization energy of K is maximum, because the second electron is removed from fully filled 3p? subshell. The second ionization energies of group 2 elements decrease down the group.
Hence, second I.E. of Ca > second I.E. of Ba.
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You can read the classification of elements and periodicity in properties class 11 notes to study class 11 ch3 and score well in class 11th exams and NEET, and JEE exams.
When the elements having similar properties repeat at regular intervals, it is called periodicity in the properties of elements.
Classification of Elements is Necessary because it helps in understanding and remembering elements' properties better, you can understand how elements react or behave, and can guess properties of unidentified or newly discovered elements.
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