Vander Waals forces are stronger in_______________?
Correct answer: D. I2
- A. F2
- B. Cl2
- C. Br2
- D. I2
Explanation
Van der Waals forces increase from F2 to I2 because the electron cloud becomes larger and more easily polarised, producing stronger temporary dipoles. F2 is the likely wrong choice because it is a halogen molecule, but its small electron cloud gives it the weakest dispersion forces here.
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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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