Oct 01, 2010 · Boiling points are a measure of intermolecular forces. The intermolecular forces increase with increasing polarization (i.e. difference in electronegativity) of bonds. The strength of the four main intermolecular forces (and therefore their impact on boiling points) is ionic > hydrogen bonding > dipole dipole > dispersion Boiling point increases with molecular weight, and with surface area.
Lewis Structures: 5 steps. Count valence e- available If an ANION, add charge to # valence e- If a CATION, subtract charge from # valence e- Draw skeleton Least electronegative atom is the central atom (usually first element in formula, never H) Slideshow 5094420 by neena.
This structure just above is the classic answer given when students are asked to draw the Lewis dot-diagram for CO. However, there are three more. This is an interesting resonance that is not discussed in the main resonance page. In these two forms, the pi bond has been rotated 90°. Let us say that one structure has the pi bond in the xy plane.