Commonly Tested Lewis Structures

We draw Lewis Structures to predict:

-the shape of a molecule.

-the reactivity of a molecule and how it might interact with other molecules.

-the physical properties of a molecule such as boiling point, surface tension, etc.

Drawing the Lewis Structure for SF4

Video: Drawing the Lewis Structure for SF4

For the SF4 Lewis structure use the periodic table to find the total number of valence electrons for the SF4 molecule. Once we know how many valence electrons there are in SF4 we can distribute them around the central atom with the goal of filling the outer shells of each atom.

Note that Sulfur is the least electronegative element in the SF4 Lewis structure and therefore goes in the middle of the structure.

There are a total of 34 valence electrons in the Lewis structure for SF4.

For the Lewis structure for SF4 you should take formal charges into account to find the best Lewis structure for the molecule.

It is helpful if you:

  • Try to draw the SF4 Lewis structure before watching the video.
  • Watch the video and see if you missed any steps or information.
  • Try structures similar to SF4 for more practice.

List of Lewis Structures

Acetone BF3 BH4- BrF5 BrO3- C2H2 C2H4 ClO-
CH4 ClO2- ClO2 ClO4- CO CS2 H2O H3O+
HCl HNO3 I3- ICl4- IF5 N2 N3- NH2OH
NH3 NO2- NO2 NO3- O2 OF2 PCl5 PH3
PO33- PO43- SCl2 SF4 SF6 SO3 SO42- XeF2