Answer:
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Explanation:
The answer is F2, it has the boiling point that is closest to Argon.
Cl2 is a molecule that is larger than F2 so it has larger london dispersion forces than F2 and NaF has high boiling point as it is an ionic compound and HCl and Hf both also have high boiling point. Argon has very low boiling point so F2 has the boiling point that is closest to the Argon.