what did you observe between the proton and the electron?
DESCRIPTION
-. +. What did you observe between the proton and the electron?. e - move towards the protons : they are attracted to each other. What holds electrons in an atom?. The attraction between the e - & p +. -. -. What did you observe between the electrons?. - PowerPoint PPT PresentationTRANSCRIPT
Lewis Structure # boding e- conc.
# lone e- pairs
Total e- conc.
Picture of Shape Shape Name
1. PF3
2. OI2
3. BF3 (boron is an exception: only needs 6 valence e-)
4. SiI4
5. CS2
- +
What did you observe between the proton and the electron?
e- move towards the protons: they are attracted to each other
What holds electrons in an atom?
The attraction between the e- & p+
- -
What did you observe between the electrons?
Do electrons like each other electrons?
NO
Conclusion….
e- like p+ &…
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
CO2, Cl2,
SiO2
BF3, CH2O
NH3, PCl3
CH4, CBr4
SCl2, H2O
Molecule Phet
# 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
Lewis Structure # boding e- conc.
# lone e- pairs
Total e- conc.
Picture of Shape Shape Name
1. PF3
2. OI2
3. BF3 (boron is an exception: only needs 6 valence e-)
4. SiI4
5. CS2
Molecule Phet
1. Which is a molecule?
A. CO2
B. CaCl2
C. NH4ClD. Li2SO4
2. Which has only single bonds?A. PF3
B. OI2
C. BF3
D. SiI4
E. CS2
F. 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