Untitled - Kelly Walsh High School

Molecular Geometry and Hybridization 153
Don’t Forget!
Don’t Forget!
simplicity, the 1s orbitals of each oxygen and MOs have not been shown here,
just the valence electron orbitals.
The bond order for O 2 would be (10 6)/2 2.
To count the bonding and antibonding electrons at energy level 1.
When adding electrons to MOs, add them to the lowest energy orbital first. If the
orbitals have equal energies remember to half-fill the orbitals and then pair-up
the electrons.
10-4 Utterly Confused About
Molecular Geometry
We will examine the geometries of the two Lewis structures derived in Section 9-7.
Η Ο
N O F
F
Xe F
In order to predict the molecular geometries, you must have a correct Lewis
structure. We will begin with the structure of nitrous acid. There are two central
atoms in this structure: the nitrogen and the oxygen atom with the hydrogen
attached. We will begin with the nitrogen atom. This atom has an octet of
electrons surrounding it. It has a lone pair and three bonding pairs distributed
between a single and two double bonds. To predict the electron-group geometry,
we count one for the lone pair, one for the single bond, and one for the
F