1.

The element having greatest difference between its first and second ionization energies, is : (1) Ca (2) Sc (3) K (4) Ba

Answer»

Correct option (3) K

Explanation:

K has 4s' configuratioon 

∴ after removal of outermost 

e it aquire inert gas conf. 

∴ Greatest jump in I.E is observes



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