Which is the most volatile substance? Chlorine, fluorine, sodium chloride or sodium fluoride?

Question

chmvijay · Answer

what u think @amsterdam11

anonymous · Answer

Well, I reckon it's not sodium chloride or sodium fluoride because there would be big electro negativity differences that attract them to each other so there would be dipole dipole bonding between them.

chmvijay · Answer

mean they are ionic compounds will be sold at room temperature ur right :)

anonymous · Answer

I think we are looking for the one with the lowest bp and with van der walls forces?

anonymous · Answer

But I can't tell whether it would be chlorine or fluorine

chmvijay · Answer

BP of Cjhlorine is -34 °C
BP of Fluorine is -188 °C

anonymous · Answer

So it would be fluorine? But how do you know which one if you don't know their bps?

anonymous · Answer

Ahh so bps increas down group 7 on the periodic table?

chmvijay · Answer

as u come from top to bottom the vandewaals force of attraction between the molecules increases :)

anonymous · Answer

Thank you!

chmvijay · Answer

bcoz the size of atoms formed in the respective molecules also increases 
Yw