The element having highest electron affinity among halogens is
Correct answer: B. Cl
- A. F
- B. Cl
- C. Br
- D. I
Explanation
Chlorine has the highest electron affinity among halogens because it strikes a balance between nuclear attraction and electron cloud size. Although fluorine is more electronegative, its small atomic size leads to increased electron-electron repulsion, making its electron affinity lower than that of chlorine. Bromine and iodine have progressively lower electron affinities due to their larger atomic sizes, which result in the added electron being further from the nucleus and experiencing less attraction.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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