Which of the following properties increase with increasing atomic number for fluorine and chlorine?

I. melting point of the elements (yes)
II. boiling point of the hydrogen halides

A) I only
B) II only
C) Both I and II
D) neither I nor II

I think it's A - is that right?

1 answer

Yes, HF has a higher boilng point than HCl. It has something to do with a larger dipole moment and intramolecular binding.

http://www.physicsforums.com/showthread.php?t=179100