Question

which diagram has arrows that point in the direction of increasing numbers?

Explanation:

Step1: Analyze Arrow Directions

For a diagram to show increasing reactivity of nonmetals, we need to recall the trend: nonmetallic reactivity generally increases across a period (left to right) and up a group (bottom to top) in the periodic table. So arrows should point right (across period) and up (across group).

Step2: Evaluate Each Diagram

• First diagram: Arrows may not align.
• Second diagram: Arrows (left and up? No, left is decreasing period).
• Third diagram: Arrows down (decreasing group) and right (increasing period) – conflicting.
• Fourth diagram: Wait, re - evaluate. Wait, the first diagram (leftmost) has a right - pointing horizontal arrow (increasing period) and up - pointing vertical arrow (increasing group) – which matches nonmetal reactivity trend (across period: left to right, reactivity increases; across group: bottom to top, reactivity increases). Wait, maybe the leftmost diagram? Wait, no, let's re - check. Wait, the question is "Which diagram has arrows that point in the direction of increasing reactivity of nonmetals?".

Wait, nonmetals: in periodic table, as we move from left to right across a period, nonmetallic character (reactivity) increases. As we move up a group (from bottom to top), nonmetallic reactivity increases. So horizontal arrow should be right (→) and vertical arrow should be up (↑). Looking at the diagrams, the left - most diagram has a right - pointing horizontal arrow and an up - pointing vertical arrow. Wait, but the options? Wait, the diagrams are four. Wait, maybe the first diagram (leftmost) is correct. Wait, but let's confirm.

Wait, the first diagram (left - most) has a horizontal arrow pointing right (increasing period, so increasing nonmetal reactivity) and a vertical arrow pointing up (increasing group, so increasing nonmetal reactivity). So this diagram's arrows are in the direction of increasing nonmetal reactivity.

Answer:

The Left - most Diagram