Molecular Shapes VSEPR Model 9.1-9.4 Flashcards
B does not follow
the octect rule
Molecular geometry
is the general shape of a molecule, as determined by the relative positions of the atomic nuclei
electron domains
how many places are electon bonds or lone paries exsist around an atom
valence-shell electron pair repulsion (VSEPR) model
predicts the shapes of molecules and ions by assuming that the valence shell electron pairs are arranged as far from one another as possible.
a molecule with 2 electron domains will always be
liner ,with zero non bonding domains
a molecule with 3 bonding domains and no nonbonding pairs will be
Trigonal planar,
a molecule with 3 electron domains and 1 non bonding domain
trigonal planar(ED), bent (MG)
a molecule with 4 electron domains and none non bonding domain
tetrahedral (ED), tetrahedral (MG)
an molecule with 3 electron domains is ______ and has ___ types of molecular gemometry
Trigonal PLanar, 2 types
an molecule with 4 electron domains is ______ and has ___ types of molecular gemometry
tetrahedral, 3 types
an molecule with 5 electron domains is ______ and has ___ types of molecular gemometry
Trigonal bipyramidal 4types
an molecule with 6 electron domains is ______ and has ___ types of molecular gemometry
octahedral 3types
a molecule with 4 electron domains and 1 non bonding domain
tetrahedral(ED), trigonal pyramidal MG)
a molecule with 4 electron domains and 2 non bonding domain
tetrahedral(ED), Bent (MG)
a molecule with 5 electron domains and none non bonding domain
trigonal pipyramidal(ED)and (MG)
a molecule with 5 electron domains and 1 non bonding domain
trigonal bipyramidal(ED), seesaw (MG)
a molecule with 5 electron domains and 2 non bonding domain
trigonal bipyramidal(ED), T-shaped (MG)
a molecule with 5 electron domains and 3 non bonding domain
trigonal bipyramidal(ED), linear (MG)
a molecule with 6 electron domains and none non bonding domain
octahedral (ED) and (MG)
a molecule with 6 electron domains and 1 non bonding domain
octahedral (ED) square pyramidal(MG)
a molecule with 6 electron domains and 2 non bonding domain
octahedra; (ED) square planar (MG)
in linear domains the bond angle is
180
Nonbonding pairs are______ than bonding pairs.
Therefore, their repulsions are greater; so…
physically larger ,this tends to decrease bond angles in a molecule.
Double and triple bonds place _______ on one side of the central atom than do single bonds.
Therefore,
greater electron density. they also affect bond angles.
when drawing the MG for trigonal bi pyramidal where do you add lone pairs
on the equatorial plane
when drawing the MG for octahedral where do you add lone pairs
on the axial plane
