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