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CGP EDU Academic Team
Published on: August 13, 2026
Which represents alkali metals (i.e. 1st group metals) based on (IE)1 and (IE)2 values (in kJ/mol) ?
(IE)1 (IE)2 (IE)1 (IE)2
Text Solution
Verified by ExpertsThe correct answer is:
C
Removal of Ist electron is easier because of bigger size but 2nd electron is to be removed from ns2 np6 configuration i.e. stable noble gas configuration. So IE2 > > IE1.
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