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NTA Abhyas NEET2020ChemistryClassification of Elements and Periodicity in PropertiesPractice

Which represents alkali metals based on relative (IE) 1 and (IE) 2 values?

Correct answer

2

Step-by-step solution

M + (alkali metal ion) has inert gas configuration. Thus, after M + is formed from M (by (IE) 1 ), further ionisation to M 2 + from M + (by (IE) 2 ) requires very high energy.

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