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Ch.10 - Molecular Shapes & Valence Bond TheoryWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Sections
Valence Shell Electron Pair Repulsion Theory
Equatorial and Axial Positions
Electron Geometry
Molecular Geometry
Bond Angles
Hybridization
Molecular Orbital Theory
MO Theory: Homonuclear Diatomic Molecules
MO Theory: Heteronuclear Diatomic Molecules
MO Theory: Bond Order
Additional Guides
Molecular Geometry (IGNORE)
VSEPR Theory

The simplest system for geometrical shapes that focuses on the number of electron groups around the central atom.

Electron Geometry

Concept #1: Understanding Electron Geometry 

The electron geometry of a compound treats surrounding elements and lone pairs on the central element as the same.

Example #1: Determine the electron geometry for the hydrogen sulfide molecule, H2S.

Practice: Determine the electron geometry for the carbon disulfide molecule, CS2

A. Linear

B. Bent

C. Trigonal planar

D. Tetrahedral

Example #2: Determine the electron geometry for the following molecule: CH2O

Practice: Determine the number of electron groups for the following cation: AsBr2+

A. 2

B. 3

C. 4

D. 1

Practice: Draw and determine the electron geometry for the following molecule: TeBr4

Practice: Determine the electron geometry of the nitrogen atom within methylamine, CH3NH2.  

A. Linear

B. Trigonal Pyramidal

C. Tetrahedral

D. Trigonal Planar