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 H2O
When you are learning to draw Lewis Structures you will see this one frequently. Be sure to make sure you are able to draw the structure for H2O quickly and accurately!
The Lewis Structure for water is useful because it allows to determine the molecular geometry and the polarity of the molecule. Because of the two lone pairs, H2O will have a bent molecular geometry and it will be a polar molecule.
Remember that Hydrogen only needs two electrons to have a full outer shell.
Video: Drawing the Lewis Structure for H2O
It is helpful if you:
- Try to draw the H2O Lewis structure before watching the video.
- Watch the video and see if you missed any steps or information.
- Try structures similar to H2O (like HCl or CH4) 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 |
XeF4 |