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| Title: | Molecular Geometry |
| Description: | Chemistry
January 8, 2025
PowerPoint - Molecular Bonding & VSEPR
Pass out
Covalent/Molecular Bonding Notes
Review VSEPR theory, octet rule, geometry vs. shape (geometry / shape) of
molecules
.....in Group 14 (tetrahedral / tetrahedral) e.g. CH4,
SiBr4
AB4
.....in Group 15 (tetrahedral / trigonal pyramidal) e.g. NH3,
PCl3 AB3E
.....in Group 16 (tetrahedral / bent or V-shape) e.g. H2O,
H2S AB2E2
.....possible to have expanded octet (e.g. PF6 is octahedron shaped
and has 12 electrons surrounding central atom)
.....possible to have less than 8 electrons around an atom (e.g. BH3
is trigonal planar shape)
Lewis Structures show number of valence electrons around each
atom.
Octet Rule - desire for each atom to have eight electrons
around it.
Single bond - two electrons shared between atom designated by a single line -
Double bond - four electrons shared...designated by a double line =
Triple bond - six electrons shared...designated by three lines
=
Discussed bond geometry...
HBr
linear 180o polar covalent
F2
linear 180o
nonpolar covalent
BH3 120o nonpolar covalent
H2O
bent 104.5o polar covalent
PF3
pyramidal 107o polar
covalent
HW: None
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| Homework: | |
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