Chemistry

Question Analysis
This question involves identifying the third key atomic factor that affects electronegativity, alongside nuclear charge and atomic radius.
The main focus is on understanding the combined atomic structure determinants of electronegativity.

Key Concept Explanation
Three factors control an atom’s electronegativity:
Nuclear charge: Higher charge increases electron attraction.
Atomic radius: Smaller radius increases electron attraction.
Shielding effect: Inner electrons block the nucleus’s positive charge, reducing attraction for valence electrons.

Step-by-Step Solution
1. List the known factors affecting electronegativity: nuclear charge,...