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 H₂O₂

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 H₂O₂ quickly and accurately!

H₂O₂ is also called Hydrogen perxoide.

The Lewis Structure for Hydrogen perxoide is useful because it allows to determine the molecular geometry and the polarity of the molecule. Because of the two lone pairs on each Oxygen atom, H₂O₂ will have a bent molecular geometry with respect to each Oxygen atom.

Remember that Hydrogen only needs two electrons to have a full outer shell.

Video: Drawing the Lewis Structure for H₂O₂

It is helpful if you:

• Try to draw the H₂O₂ Lewis structure before watching the video.
• Watch the video and see if you missed any steps or information.
• Try structures similar to H₂O₂ (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