Question Detail

CHM 101 Periodic Table & Trends Objective Question
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Question

Given electron configurations [He]2s¹, [Ne]3s¹, and [Ar]4s¹, the order of *increasing* first ionization energy is __________ < __________ < __________.
Options
A A < B < C
B C < B < A
Correct Answer
C B < A < C
D A < C < B
Correct Answer

Option B is the correct answer.

Detailed Explanation

These are configurations of Li (A), Na (B), and K (C). Ionization energy decreases down Group 1, so K (largest) has the lowest IE, then Na, then Li (highest IE). Therefore, increasing IE order is C (K) < B (Na) < A (Li).

Hint

IE decreases down a group. Identify the elements from their configurations.

Question Info

Course: CHM 101
Topic: Periodic Table & Trends
Type: Objective
Difficulty: Not specified
Question 206 of 1872
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