Identify one pair of adjacent elements in Period 2 for which the first ionization…

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

Problem

Identify one pair of adjacent elements in Period 2 for which the first ionization energy decreases instead of increasing when moving left-to-right across the period.

Related theory

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

Browse the problem library