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Shapes of molecules Alevel notes
- Module
- Physical chem
- Institution
- OCR
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number of bond pairs and lone pairs of electronsUse the
Of the molecule
molecules have specific shapes with specific ang
This is because bonds repel each other equally . Bono
So they will want to be as far apart as possible
Because a lone pair
cloler to
-
Strength of repulsion Is slightly more
and occupies
1) lone pairs and lone pairs have the strongest re
2) Bond pairs and lone pairs have the second s
3) Bond pairs and bond pairs have the weakes
The more lone pairs present ,
the angles bec
Squished .
So lone pairs change the snape and bond an
Pairs push bonding pairs closer together
Cha
Generally for every lone pair you pairs
·
as cha
reduce the remaining bond angles while
2 50
by .
· electro
charged
repel e
a
they
Dotted lines 11111/--- :
Possibl
snow bond, going away from you as tar
·
lone p
wedges -
( => snow bonds
going than bo
,
,
,
,
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