Compare the melting point

Among the three given substances, HF and F2 are molecular, but NaF is ionic which does not contain any molecule.

The melting point of NaF is high. NaF has giant ionic structure, and the ions of Na+ and F- are held together by strong electrostatic forces.

The melting points of F2 and HF are low. Both of them has simple molecular structure, and the molecules are held together by weak intermolecular forces. HF has a higher melting point than F2. This is because HF molecules are held together by hydrogen bonds (which are stronger) while F2 molecules are held together by van der Waals' forces (which are weaker).
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melting pt.唔係睇H-F and F-F分別自己的bond咩?
即係比較H-F強d定 F-F強d?

而boiling pt.先至係睇molecule同molecule之間的吸力?

thanks~