Chemistry

Question Analysis
This question evaluates the student's understanding of the periodic trends in electronegativity and the factors that influence these trends, specifically focusing on the vertical movement within a group.

Key Concept Explanation
Electronegativity is the relative ability of an atom to attract shared electrons in a chemical bond. As you move down a group, the number of electron shells increases, leading to a larger atomic radius. Although the nuclear charge also increases, the effect of the larger atomic radius is more significant, resulting in a decrease in electronegativity.

Step-by-step Solution
1. Identify the key concept: Electronegativity trends down a group.
2. Recall that electronegativity decreases as ...