Question Detail
Question
Among Li, Mg, Na, and Al, the element with the *lowest* first IE is __________. (Q3)
Correct Answer
Option C is the correct answer.
Detailed Explanation
Sodium (Na) is an alkali metal (Group 1) and is lower in its group than Li. Alkali metals have the lowest IEs in their periods. Among these, Na has the largest radius and good shielding, giving it the lowest IE.
Hint
Think about group trends: Alkali metals have very low IE.