Midterm 1

Greatest Repulsion
Lone-Pair – Lone-Pair
Least Repulsion
Bonding-Pair – Bonding-Pair
Middle Repulsion
Lone-Pair – Bonding-Pair
Bond Angles Around Central Atom
These bond angles decrease as repulsive froces increase
Tetrahedral
4 bonded atoms 0 lone pairs
Trigonal Pyramidal
3 bonded atoms 1 lone pair
Bent (Angular)
2 Bonded Pairs 2 Lone Pairs
Trigonal BiPyramidal
5 Bonded Atoms 0 Lone Pairs
Seesaw
4 Bonded Atoms 1 Lone Pair
T-Shaped
3 Bonded Atoms 2 Lone Pairs
Linear
2 Bonded Atoms 3 Lone Pairs
Tetrahedral Valence Shell
SN 4
Trigonal BiPyramidal Valence Shell
SN 5
Octahedral
6 Bonded Atoms 0 Lone Pairs
Square Pyramidal
5 Bonded Atoms 1 Lone Pair
Square Planar
4 Bonded Atoms 2 Lone Pairs
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