Question Detail

CHM 101 Periodic Table & Trends Objective Question

Question

Among Li, Mg, Na, and Al, the element with the *lowest* first IE is __________. (Q3)
Options
A Li
B Mg
C Na
Correct Answer
D Al
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.

Question Info