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Molecule
Identify the
Central
Atom
Number of
atoms bonded to
central
atom
Number of *non-bonding electron
pairs
around the
central
atom
Number of VESPR Groups**
Draw
the Lewis structure showing the correct shape.
Use element symbols, dots for non-bonding electron pairs and
dashes for bonded electrons.
Name the shape.
BeCl2
CO2
HCN
BF3
CH2O
SO2
CH4
NH3
H2O
* The speaker uses the term “lone electron pair” instead of non-
bonding electron pair. It is the same thing.
**Number VESPR Groups is equal to the number of atoms
bonded to the central atom plus the number of non-bonding
pairs.

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  • 1. Molecule Identify the Central Atom Number of atoms bonded to central atom Number of *non-bonding electron pairs around the central atom Number of VESPR Groups** Draw the Lewis structure showing the correct shape. Use element symbols, dots for non-bonding electron pairs and dashes for bonded electrons.
  • 4. NH3 H2O * The speaker uses the term “lone electron pair” instead of non- bonding electron pair. It is the same thing. **Number VESPR Groups is equal to the number of atoms bonded to the central atom plus the number of non-bonding pairs.