Sigma or Pi
Stronger
Sigma
assumption that molecular shapes are largely distributed by repulsion of regions of e- concentration
VSEPR (valence shell electron pair repulsion)
determined by
shape (symmetry)
O2
linear
δ− or δ+ indicates
partial charge
Overlapping p orbitals
pi
vector sum of all bond polarities that exist in molecule
dipole moment
determined by difference in electronegativity (which polarity)
pyramidal
T/F: All molecules must have an octet of electrons to form.
False
Overlapping s and/or p orbitals
sigma
covalent bonds are formed when orbitals of different atoms overlap (gives sigma and pi)
valence bond theory
bent: always or sometimes
always
N2
linear
paramagnetism
Double bond-how many of each?
Sigma-1
Pi-1
predicts magnetic qualities
molecular orbital
tetrahedral: always or sometimes
sometimes
CH4
tetrahedral
new kinds of orbitals of equal energy are formed from combination of orbitals of different energies
hybridization
MgO: How many of each?
1 of each
No single Lewis structure completely describes e- distribution
resonance
NH3
polar (pyramidal)
H2S
bent
clotting material that stops bleeding through charge attraction
chitosan