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Summary of shapes of molecules - Creative Chemistry
4. 2. 0. 2 linear linear. BeCl2. 6. 3. 0. 3 trigonal planar trigonal planar. BF3. 4. 0. 4 tetrahedral. CH4. 3. 1. 4 trigonal pyramidal. NH3. 8. 2. 2. 4 tetrahedral bent line.
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Summary of shapes of molecules
Number of valence electrons
Number of bonding pairs of electrons
Number of lone pairs of electrons
Total number of electron pairs
4
2
0
2
linear
linear
BeCl2
6
3
0
3
trigonal planar
trigonal planar
BF3
4
0
4
tetrahedral
CH4
3
1
4
trigonal pyramidal
NH3
2
2
4
bent line
H2O
5
0
5
trigonal bipyramidal
PF5
4
1
5
8
10
Arrangement of orbitals
tetrahedral
Arrangement of atoms
Examples
SF4
trigonal bipyramidal 3
2
5
ClF3
2
3
5
linear
I3–
6
0
6
octahedral
SF6
5
1
6
square pyramidal
IF5
4
2
6
square planar
ICl4–
12 octahedral
Go to http://www.creative-chemistry.org.uk/molecules/ for animated models of these shapes. Copyright © 2003 Nigel Saunders
N-ch1-15
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