Which element has the highest first electron affinity among the halogens?
Answer and explanation
Correct answer: A. Chlorine pathway
Chlorine has the highest electron affinity among halogens. Although fluorine is more electronegative, its small atomic radius results in high electron-electron repulsion in the compact 2p subshell, reducing net energy release upon electron capture.
Practise more Atomic Structure and Periodic Properties.
Free questions with an explanation for every one, and full timed Medical University Entrance Examination (Bulgaria) mock tests.
More Atomic Structure and Periodic Properties questions
- Which set of quantum numbers describes an electron in a 3d subshell orbital?
- What is the ground-state electron configuration of the transition metal chromium (Z = 24)?
- What is the ground-state electron configuration of the neutral copper atom (Z = 29)?
- Which rule states that electrons fill degenerate orbitals singly with parallel spins before pairing up?
- Why does oxygen have a slightly lower first ionization energy than nitrogen (1314 vs 1402 kJ/mol)?
- Why does boron have a lower first ionization energy than beryllium (801 vs 899 kJ/mol)?