Question
Question: Which of the following relation is correct with respect to first (I) and second (II) ionization enth...
Which of the following relation is correct with respect to first (I) and second (II) ionization enthalpies of potassium and calcium ?
A
ICa> IIK
B
IK> Ica
C
IICa> IIK
D
IIK> IICa
Answer
IIK> IICa
Explanation
Solution
Second ionisation energy of sodium is greater than that of Mg. In case of sodium ion (i.e. Na+) the electron removal from the stable inert gas configuration (1s2 2s2 2p6) requires much higher energy.