Which of the following will have highest value of electron affinity_________________?
Correct answer: B. Cl
- A. F
- B. Cl
- C. Br
- D. I
Explanation
Chlorine has the highest electron affinity among F, Cl, Br and I because its larger 3p orbital accommodates the added electron with less electron-electron repulsion than fluorine's compact 2p orbital. Students often choose F because it is more electronegative and smaller, but electron affinity is unusually lower for fluorine than for chlorine.
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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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