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
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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
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- +
What did you observe between the proton and the electron?
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e- move towards the protons: they are attracted to each other
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What holds electrons in an atom?
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The attraction between the e- & p+
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- -
What did you observe between the electrons?
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Do electrons like each other electrons?
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NO
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Conclusion….
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e- like p+ &…
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e- REPEL
e- move as far away from each other…..
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However, they do exist in pairs (remember two per e- cloud shape)
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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
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Molecule Phet
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# 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
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Pyramidal
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Bent
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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
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Molecule Phet
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1. Which is a molecule?
A. CO2
B. CaCl2
C. NH4ClD. Li2SO4
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2. Which has only single bonds?A. PF3
B. OI2
C. BF3
D. SiI4
E. CS2
F. all single bonds
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4. What shape is water?
A. TetrahedralB. BentC. Trigonal planarD. Linear
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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
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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
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6. Which molecule could be represented with this diagram?
A. BH3
B. CH4
C. NH3
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7. Which molecule could be represented with this diagram?
A. HClB. CH4
C. NH3
D. F2