Which of the following possesses the weakest London dispersion forces?
Correct answer: E. He
- A. F2
- B. Br2
- C. Cl2
- D. I2
- E. He
Explanation
The correct answer is Option E: He. Helium is a noble gas characterized by its minimal atomic size and the lowest number of electrons among the options provided. This results in the weakest London dispersion forces. In comparison, F2 has more electrons than He, giving it stronger dispersion forces. Cl2 and Br2 are larger and have more electrons, further increasing their dispersion forces relative to He. I2 is the largest and heaviest, possessing the strongest dispersion forces of all.
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About Properties of Liquids
Liquid behavior depends on intermolecular forces, which produce surface tension, viscosity, capillary action and a definite volume without a fixed shape. The topic also covers vapor pressure, evaporation, boiling point and the effect of temperature and external pressure, while distinguishing evaporation at the surface from boiling throughout the liquid.
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