VSEPR Theory & Hybridization

Question 1

What does VSEPR stand for?

Answer 1

Valence
Shell
Electron
Pair
Repulsion

Question 2

Central Atom

Answer 2

Atom in the center of the molecule; look at this atom to determine shape

Question 3

Steric Number

Answer 3

Number of lone pairs plus bonded atoms around the central atom

Question 4

Electron Domain

Answer 4

how the electrons are arranged around the central atom

Question 5

Electron Domains of Steric #’s: 2, 3, 4, 5, 6

Answer 5

EPA:
2 - Linear
3 - Trigonal Planar
4 - Tetrahedral
5 - Trigonal Bipyramidal
6 - Octahedral

Question 6

Molecular Geometry or Shape

Answer 6

Actual 3-D shape of molecule
(NOTE: When there are no lone pairs on the central atom, the EPA and molecular shape are the SAME.)
WEBSITE FOR MOLECULAR GEOMETRY/SHAPE (https://useruploads.socratic.org/gHtA8K9NTU6WpzmkgmCX_vsepr_theory.jpg).

Question 7

Steric number of 2
2 bonded atoms
0 lone pairs

Answer 7

EPA: Linear
Molecular Geometry: Linear
Bonding Angle: 180°

Question 8

Steric number of 3
3 bonded atoms
0 lone pairs

Answer 8

EPA: Trigonal Planar
Molecular Geometry: Trigonal Planar
Bonding Angle: 120°

Question 9

Steric number of 3
2 bonded atoms
1 lone pair

Answer 9

EPA: Trigonal Planar
Molecular Geometry: Bent
Bonding Angle: <120°

Question 10

Steric Number of 4
4 bonded atoms
0 lone pairs

Answer 10

EPA: Tetrahedral
Molecular Geometry: Tetrahedral
Bonding Angle: 109.5°

Question 11

Steric Number of 4
3 bonded atoms
1 lone pair

Answer 11

EPA: Tetrahedral
Molecular Geometry: Trigonal Pyramidal
Bonding Angle: <109.5°

Question 12

Steric Number of 4
2 bonded atoms
2 lone pairs

Answer 12

EPA: Tetrahedral
Molecular Geometry: Bent
Bonding Angle: «109.5°

Question 13

Steric Number of 5
5 bonded atoms
0 lone pairs

Answer 13

EPA: Trigonal Bipyramidal
Molecular Geometry: Trigonal Bipyramidal
Bonding Angle: 120°, 90°

Question 14

Steric Number of 5
4 bonded atoms
1 lone pair

Answer 14

EPA: Trigonal Bipyramidal
Molecular Geometry: Seesaw
Bonding Angle: <120°, <90°

Question 15

Steric Number of 5
3 bonded atoms
2 lone pairs

Answer 15

EPA: Trigonal Bipyramidal
Molecular Geometry: T-Shaped
Bonding Angle: <90°

Question 16

Steric Number of 5
2 bonded atoms
3 lone pairs

Answer 16

EPA: Trigonal Bipyramidal
Molecular Geometry: Linear
Bonding Angle: 180°

Question 17

Steric Number of 6
6 bonded atoms
0 lone pairs

Answer 17

EPA: Octahedral
Molecular Geometry: Octahedral
Bonding Angle: 90°

Question 18

Steric Number of 6
5 bonded atoms
1 lone pair

Answer 18

EPA: Octahedral
Molecular Geometry: Square Pyramidal
Bonding Angle: <90°

Question 19

Steric Number of 6
4 bonded atoms
2 lone pairs

Answer 19

EPA: Octahedral
Molecular Geometry: Square Planar
Bonding Angle: 90°

Question 20

Steric Number of 6
3 bonded atoms
3 lone pairs

Answer 20

EPA: Octahedral
Molecular Geometry: T-Shaped
Bonding Angle: <90°

Question 21

Steric Number of 6
2 bonded atoms
4 lone pairs

Answer 21

EPA: Octahedral
Molecular Geometry: Linear
Bonding Angle: 180°

Question 22

Hybridization is/are

Answer 22

• Mixed orbitals
• Based on steric number

Question 23

Hybridization based on steric number 2

Answer 23

sp

Question 24

Hybridization based on steric number 3

Answer 24

sp^2

Question 25

Hybridization based on steric number4

Answer 25

sp^3

Question 26

Hybridization based on steric number 5

Answer 26

sp^3d

Question 27

Hybridization based on steric number 6

Answer 27

sp^3d^2