Molecular Geometry & VSEPR Flashcards
VSEPR:
Valence Shell Electron Pair Repulsion
What is VSEPR theory used to?
to predict 3-D geometric shapes of molecules
(According to VSEPR theory) the repulsion forces of valence-level e- pairs will cause atoms of a molecule to…
spread out as far apart as possible
VSEPR theory assumes that the shape of a molecule is determined by:
the repulsion of e- pairs
Molecular properties depend on:
bonding of atoms & molecular geometry
molecular geometry:
the three dimensional arrangement of a molecule’s atosm
Chemical formula reveals little info abt…
molecule’s geometry
Linear shape:
molecules w/ two e- pairs bonded to central atom O-O-O
Trigonal Planar shape:
molecules w/ three e- pairs bonded to the central atom
(fidget spinner)
Types of e- pairs:
shared pairs and lone pairs
shared pair:
pair of shared e-
lone pair:
not shared e- pairs
lone pairs repel _____than shared pairs
strongly
Tetrahedral Shape:
molecules with four e- pairs bonded to the central atom
Bent Shape:
two e- pairs and one lone pair (chopsticks)