7th inning stretch Draw the Lewis structure for each:1. PCl3
2. SCl2
3. CS2
4. CH4
7th inning stretch Draw the Lewis structure for each:1. PCl3
2. SCl2
3. CS2
4. CH4
The lewis structure of water:
Water has 2 shared & 2 unshared pairs of e-
H 2 X 1e- =2e-
O 1 X 6e- =6e-
Total 8e-
O H H
__
- 4e- bonded
4 e-
..:
unshared e-
Shared e-
- +
What did you observe?
e- move towards the protons
What holds electrons in an atom?
e- like protons
Do electrons like each other electrons?
NO
- -
What did you observe between the electrons?
e- Repel
e- move as far away from each other…..
However, they do exist in pairs (remember two per e- cloud shape)
Draw the following table:
# OF TOTAL PAIRS
# Share
d e- Pairs
# Unshar
ed e- Pairs
Shape Picture Examples
VSEPRTHEORY
# OF TOTAL PAIRS
# Share
e- Pairs
# Unshare
d e- Pairs
Shape Picture Examples
VSEPRTHEORY
2 2 0 linear
3 3 0Trigonal Planar
Pyramidal
Tetrahedral
Bent
CO2 Cl2BCl3CH2O
NH3PCl3CH4
CBr4
SCl2H2O
4 3 1
4 4 0
4 2 2
Pyramidal
Bent
Molecule Phet
1. Which is a molecule?
A. CO2
B. CaCl2
C. NH4ClD. Li2SO4
2. Which would have a linear shape?
A. HBrB. CO2
C. Both are linear
3. Which has only single bonds?A. HBrB. CO2
C. Both have all single bonds
4. What shape is water?
A. TetrahedralB. BentC. Trigonal planarD. Linear
5. Which is an example of an exception to the octet rule?
A. O2
B. N2
C. BF3
D. I2
E. More than one of these
5ans. Which is an example of an exception to the octet rule?
A. O2
B. N2
C. BF3
D. I2
E. More than one of these
6. Which molecule could be represented with this diagram?
A. BH3
B. CH4
C. NH3
7. Which molecule could be represented with this diagram?
A. HClB. CH4
C. NH3
D. F2