Transcript Do electrons like other electrons?

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:
H
2 X 1e- =2e-
O 1 X 6e- =6eTotal
..
unshared e-
: O __ H
H
Shared e-
8e- 4e- bonded
4 e-
Water has 2 shared & 2 unshared pairs of 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)
V
S
E
P
R
THEORY
Draw the following table:
# OF
TOTAL
PAIRS
#
#
Shared Unshared
e- Pairs
e- Pairs
Shape
Picture
Examples
V
S
E
P
R
# OF
TOTAL
PAIRS
2
# Share
e- Pairs
2
3 3
# Unshared
e- Pairs
Shape
Examples
CO2
Cl2
0
linear
0
Trigonal
Planar
BCl3
CH2O
Pyramidal
NH3
PCl3
4 3 1
4 4 0 Tetrahedral
THEORY
4
Picture
2 2
Bent
CH4
CBr4
SCl2
H2O
Pyramidal
Bent
Molecule Phet
1. Which is a molecule?
A. CO2
B. CaCl2
C. NH4Cl
D. Li2SO4
2. Which would have a linear shape?
A. HBr
B. CO2
C. Both are linear
3. Which has only single bonds?
A. HBr
B. CO2
C. Both have all single
bonds
4. What shape is water?
A.
B.
C.
D.
Tetrahedral
Bent
Trigonal planar
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.
B.
C.
D.
HCl
CH4
NH3
F2