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Questions  

Which of the following atom has the highest first ionization energy ? 

a
Sc
b
Rb
c
Na
d
K

detailed solution

Correct option is A

Due to poor shielding of d – electron Z effective of Sc is high.  Ionization energy of Sc is more than Na, K and Rb

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Similar Questions

Statement 1: The metals of 4d and 5d transition series have greater enthalpies of atomization than the corresponding elements of the 3d series.

Statement 2: The metal bond in 4d and 5d series are stronger than those in the 3d series.


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