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Organic
bonding and structure
shapes of molecules
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Lyla Bensley
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Cards (13)
shapes of molecules and ions depends on the
total
number of
electron pairs
around the
central
atom
there are two types of electron pairs,
bonding
pairs and
lone
pairs
electron pairs repel as
far
as possible
Lone pairs repel more than bonding pairs
lone
pairs are closer to the
nuclei
than
bonding
pairs
2
bonding pairs which
repel evenly
and
zero
lone pairs. the shape is
linear
with a bond angle of
180
degrees
3
bonding pairs and
zero
lone pairs. shape is
trigonal planar
with a bond angle of
120
4
electron pairs and
0
lone pairs. shape is
tetrahedral
with a bond angle of
109.5
5
electron pairs. shape is
trigonal bipyramidal
with a bond angle of
120
and
90
6
bonding pairs. shape is
octahedral
with a bond angle of
90
3
bonding pairs and
1
lone pair. shape is
pyramidal
with a
decreased
bond angle by
2.5
so a bond angle of
107
2
bonding pairs and
2
lone pairs. shape is
non-linear
/
bent
with a bond angle of
104.5
diagram
A)
linear
B)
linear
C)
trigonal planar
D)
bent or non-linear
E)
tetrahedral
F)
trigonal pyramidal
G)
trigonal bipyramidal
H)
octahedral
8
