The element with highest electron affinity among halogens is
Correct answer: D. Cl
- A. F
- B. I
- C. Br
- D. Cl
Explanation
Chlorine has the highest electron affinity among the halogens. While fluorine is more electronegative, its small size results in significant electron-electron repulsion, reducing its electron affinity compared to chlorine. Iodine and bromine have larger atomic sizes, leading to lower electron affinities. Chlorine's electron affinity is highest because its atomic size and effective nuclear charge allow it to attract additional electrons more effectively.
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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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