Question

question 8. which of the following diagrams has arrows that point in the direction of increasing ionization energy?

Explanation:

Step1: Recall Ionization Energy Trends

Ionization energy (IE) generally increases across a period (left to right) and decreases down a group (top to bottom). This is because across a period, effective nuclear charge increases, pulling electrons closer; down a group, electrons are in higher energy levels, farther from the nucleus.

Step2: Analyze Each Diagram's Arrows

• First Diagram: Vertical arrow down (decreasing IE, wrong), horizontal arrow right (increasing IE, but vertical is wrong).
• Second Diagram: Vertical arrow up (increasing IE, correct trend down - group? Wait, no—wait, vertical direction: top to bottom is decreasing IE, so up (bottom to top) is increasing. Horizontal arrow right (increasing IE, correct for period). So vertical up (increasing IE down - group? Wait, no: IE decreases down a group, so moving up a group (smaller n) increases IE. So vertical arrow up (from lower period to higher period, i.e., up the group) is increasing IE. Horizontal arrow right (across period, increasing IE). So both arrows in second diagram follow IE trends: up (group: increasing IE) and right (period: increasing IE).
• Third Diagram: Horizontal arrow left (decreasing IE, wrong).
• Fourth Diagram: Vertical arrow up (increasing IE, but horizontal arrow left (decreasing IE, wrong).

Answer:

The second diagram (the middle one with vertical arrow up and horizontal arrow right)