Ch.10 - Molecular Shapes & Valence Bond TheorySee 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

According to the VSEPR Model, bond angles result from surrounding elements and lone pairs around the central element positioning themselves at an optimal distance. 

Idealized Bond Angles

Concept #1: VSEPR Model for Bonding 

The Valence Shell Electron Pair Repulsion (VSEPR) theory gives bond angles based on the number of groups around the central element. 

Concept #2: Ideal Bond Angles

The more lone pairs on the central element then the more compressed the bond angle, and the greater the deviation from an ideal bond angle. 

Concept #3: Lone Pairs & Bond Angles 

Example #1: Determine the bond angles of each of the following compounds. 

CO2

Example #2: Determine the bond angles of each of the following compounds. 

BrF4+

Practice: Determine the bond angle of the following compound. AsCl5

Practice: Determine the bond angle of the following compound: IF3.