A gaseous element X has the highest first ionization energy in its period (≈2 080…

CHEMISTRY · Single correct · A Level · Chemistry · Periodicity and periodic trends · Periodicity and periodic trends

Problem

A gaseous element X has the highest first ionization energy in its period (≈2 080 kJ·mol⁻¹) while exhibiting an electron affinity close to zero. Which element is X most likely to be? (a)

\text{F}

(b)

\text{He}

(c)

\text{Ne}

(d)

\text{N}

Related theory

Ionisation enthalpy
Classification of Elements and Periodicity in Properties
Electron configurations
Ionisation potential
Periodic Trends in Physical Properties

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