Which of the following statements are correct?
A. The process of the addition an electron to a neutral gaseous atom is always exothermic
B. The process of removing an electron from an isolated gaseous atom is always endothermic
C. The 
ionization energy of the boron is less than that of the beryllium
D. The electronegativity of C is 2.5 in 
and 
E. Li is the most electropositive among elements of group I
Choose the correct answer from the options gives below
Text Solution
Verified by ExpertsA
The process of adding an 
to a neutral gaseous atom is not always exothermic it may be exothermic or endothermic.
In Be 2 s subshell in fully filled
So, need high energy to remove 
as compared to B .
In 
due to partially positive charge 
So, EN of 
(E) Cs is most electropositive.
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