Electronegativity Worksheet
electronegativity
For our purposes use the definitions in the chart. The
most polar bond determi nes the polarity of a mole cule (i.e.
if a compound contains one non-polar, and one polar
bond the molecule, as a whole, is considered to be polar)
% ionic character
ΔEN
polarity
0 – 10 0 – 0.5 non-polar
10 – 50 0.5 – 1.7 polar (covalent)
50 – 100 1.7 + ionic
A B C D E F G
Molecule Lewis structure
Draw shape.
Indicate bond
dipoles
ΔEN of
bonds
Polarity of
bonds (ignore
shape)
Symmetrical
molecule?
(i.e. all pulls
cancel out)
Polarity of
molecule
1. NH
3
3.1 – 2.1
= 1.0
polar No polar
2. N
2
3. HBr
H Br
4. OCl
2
5. SF
6
H
6. SO
2
7. SiCl
4
8. CF
2
Cl
2
C-F:
C-Cl:
9. XeF
4
Note: the EN
for Xe is 2.6
10. C
2
H
4
C-C:
C-H:
Q – which binary (two element) compound would have the greatest ΔEN?
H
H N
N N
Br
H
F
S
F
F
F
F
F
S
O O
O
S
O
C
F
F
Cl
Cl
Si
Cl
Cl
Cl
Cl
H
C C
H
H
H
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