question

C

answer

VSEPR theory includes two types of geometries: electron geometry and molecular geometry. What is the difference between the two geometries?
A. The electron geometry only considers lone pairs of electrons and the molecular geometry only considers the atoms.
B. There is no difference between electron and molecular geometries; they are simply different names for the same thing.
C. Electron geometry describes the arrangement of the electron groups in a molecule, whereas the molecular geometry describes the arrangement of the atoms.
D. Lone pairs are included in the electron geometry but play no role in the molecular geometry.

question

PF3, SBr2, CH3Br

answer

In which cases do you expect deviations from the idealized bond angle? (Check all that apply)
PF3
SBr2
CH3Br
BCl3
Since PF3 and SBr2 both have lone pairs of electrons on the central atom, their bond angles should deviate from the idealized bond angle as lone pairs are more repulsive than bonding pairs of electrons. Large atoms, such as Cl or Br, will cause bond angles to deviate from the ideal, and the presence of a multiple bond will cause a deviation as well owing to the increased electron density, so CH3Br should deviate from the idealized bond angle. BCl3 has identical atoms symmetrically surrounding a central atom with no lone pairs on it, so BCl3 should not deviate from the idealized bond angle.

question

linear, trigonal planar, tetrahedral, trigonal bipyramidal, octahedral

answer

name the 4 types of electron geometry:
2 bonds
3 bonds
4 bonds
5 bonds
6 bonds

question

sp, sp2, sp3, sp3d, sp3d2

answer

name the hybridizations for the following:
linear
trigonal planar
tetrahedral
trigonal bipyramidal
octahedral

question

linear, linear, sp, 180, nonpolar

answer

2 bonds; 0 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

linear, linear, sp, none, depends

answer

2 bonds; 1 lone pair:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar=

question

trigonal planar, trigonal planar, sp2, 120, nonpolar

answer

3 bonds; 0 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

trigonal planar, bent, sp2, <120, polar

answer

3 bonds; 1 lone pair:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

trigonal planar, linear, sp2, none, depends

answer

3 bonds; 2 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

tetrahedral, tetrahedral, sp3, 109.5, nonpolar

answer

4 bonds; 0 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

tetrahedral, trigonal pyramidal, sp3, <109.5, polar

answer

4 bonds; 1 lone pair:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

tetrahedral, bent, sp3, <109.5, polar

answer

4 bonds; 2 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

tetrahedral, linear, sp3, none, depends

answer

4 bonds; 3 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

trigonal bipyramidal, trigonal bipyramidal, sp3d, 90,120,180, nonpolar

answer

5 bonds; 0 lone pairs
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

trigonal bipyramidal, seesaw, sp3d, <90,120,180, polar

answer

5 bonds; 1 lone pair:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

trigonal bipyramidal, T-shape, sp3d, <90,180, polar

answer

5 bonds; 2 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

trigonal bipyramidal, linear, sp3d, 180, nonpolar

answer

5 bonds; 3 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

trigonal bipyramidal, linear, sp3d, none, depends

answer

5 bonds; 4 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

octahedral, octahedral, sp3d2, 90, nonpolar

answer

6 bonds; 0 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

octahedral, square pyramidal, sp3d2, <90, polar

answer

6 bonds; 1 lone pair:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

octahedral, square planar, sp3d2, 90, nonpolar

answer

6 bonds; 2 lone pairs:
e- geometry=
molecular geometry=
hybridization=
bond angle=
polar or nonpolar?

question

nonpolar, polar

answer

if the bond angles are exact = polar or nonpolar?
if the bond angles are "less than" = polar or nonpolar?

question

nonpolar, polar

answer

linear - no bond angle:
atoms same element = polar or nonpolar?
atoms different elements = polar or nonpolar

question

lone pairs

answer

e- geometry includes all bonded + lone pairs
molecular geometry excludes what?

question

A, B, N

answer

to make a VSEPR sketch you first need a Lewis dot diagram.
to "type it":
central atom=
terminal atoms=
nonbonding e- PAIRS on CENTRAL ATOM=

question

linear, 180, linear, none

answer

e- geometry= linear:
0 LP=
-bond angle=
1 LP=
-bond angle=

question

trigonal planar, 120, bent, <120, linear, none

answer

e- geometry= trigonal planar
0 LP=
-bond angle=
1 LP=
-bond angle=
2LP=
-bond angle=

question

tetrahedral, 109.5, trigonal pyramidal, <109.5, bent, <109.5, linear, none

answer

e-geometry= tetrahedral
0 LP=
-bond angle=
1 LP=
-bond angle=
2LP=
-bond angle=
3LP=
-bond angle=

question

trigonal bipyramidal, 90,120,180, seesaw, <90,120,180, T-shape, <90,180, linear, 180, linear, none

answer

e- geometry= trigonal bipyramidal
0 LP=
-bond angle=
1 LP=
-bond angle=
2LP=
-bond angle=
3LP=
-bond angle=
4LP=
-bond angle=

question

octahedral, 90, square pyramidal, <90, square planar, 90

answer

e- geometry= octahedral
0 LP=
-bond angle=
1 LP=
-bond angle=
2LP=
-bond angle=