[benzenejamie]

do stronger bonds mean greater density necessarily?

[TWOFOUSAND]

hmmmmmmmmm This is interesting.. i wanna know this too.

[boltzmann77]

I would say that it depends on what you are looking at.

1.   Elements (atomic elements (eg. Sodium not the molecular ones eg. Oxygen)
a.   Here bonds do matter. Stronger bonds between the atoms means the   atoms are closer together. Hence, more atoms per unit volume. So if you are looking at two different elements with comparable atomic weights, the one with stronger bonds will be denser.

2.   Compounds (Water, Methane etc.) and Molecular elements (eg. Oxygen)
a.   Here the bond strengths don’t necessarily play a big role. Intermolecular forces decide which one is denser.
b.   All of this is assuming that molecular sizes and weights are comparable.

I can’t see a lot of practical applications with this comparison, but it’s worth thinking about to apply concepts that are learned in chemistry.