Three third-period elements have the following measured properties: • Element X:…
CHEMISTRY · Subjective · A Level · Chemistry · Periodicity and periodic trends · Periodicity and periodic trends
Problem
Three third-period elements have the following measured properties:
• Element X: first-ionization energy = 578 kJ·mol⁻¹, electronegativity = 1.0
• Element Y: first-ionization energy = 801 kJ·mol⁻¹, electronegativity = 1.5
• Element Z: first-ionization energy = 1000 kJ·mol⁻¹, electronegativity = 2.0
Arrange the elements in order of expected electron affinity (most negative to least negative) and state your reasoning in a single sentence.