Indicate the sign (positive or negative) of the electron affinity when a gaseous…

CHEMISTRY · Subjective · A Level · Chemistry · Periodicity and periodic trends · Periodicity and periodic trends

Problem

Indicate the sign (positive or negative) of the electron affinity when a gaseous chlorine atom gains one electron and state whether the process is exothermic or endothermic.

Related theory

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

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