Worksheet 6: Constructing 2-Dimensional Lewis dot structures
A
B
C
Name
molec
formula
Initial
layout
EN
values
Ionic
or
cova
lent
bond
D
E
F
G
H
I
J
K
L
N
A
S
B
Octet?
=
or
+
| :
Lewis
dot
structure
#eregions
CH4
NH3
H2O
CO2
SF6
NO3ICl2SO2
* On the back, insert compounds like the following: CHCl3SO32-, XeF2, SeF6, H3O+, PF6-, ClF3or C2H2and complete the table.
Explanation of columns:
B
Create symmetrical layout of atoms and assign EN values to each atom
D
Calculate ΔEN> 1.5, bond is ionic. If ΔEN< 1.5, bond is covalent.
D-G
Assign needed (N), available (A), shared electrons (S) and bond sites (B) for Lewis dot determination
H
does structure follow octet rule. If yes, then answer J and K as below.
I
double or triple bonds in molecule is S/2> B
J
Resonance if (S/2)/B is not an integer
K
Create Lewis dot structure
L
Count regions of electron density to perform VSEPR and VB determinations
Constructing 2-Dimensional Lewis dot structures
A
B
C
Name
molec
formula
Initial
layout
EN
values
Ionic
or
cova
lent
bond
D
E
F
G
H
I
J
K
L
N
A
S
B
Octet?
=
or
+
| :
Lewis
dot
structure
#eregions