Despite having a higher electronegativity and first-ionization energy

CHEMISTRY · Subjective · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

Despite having a higher electronegativity and first-ionization energy, fluorine has a slightly less exothermic electron affinity than chlorine. Cite two specific, atomic-level factors that together account for this deviation from the usual trend.

Related theory

Electron gain enthalpy and electronegativity
Classification of Elements and Periodicity in Properties
Periodic Trends in Physical Properties

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