Ch.9 - Bonding & Molecular StructureWorksheetSee 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
Chemical Bonds
Lattice Energy
Lattice Energy Application
Born Haber Cycle
Dipole Moment
Lewis Dot Structure
Octet Rule
Formal Charge
Resonance Structures
Additional Practice
Bond Energy

Solution: Charge separation in the hydrogen halides. In HF, the strongly electronegative F pulls much of the electron density away from H. In HI, the I, being much less electronegative than F, does not

Problem

HF appears as a small sphere fused with a much larger sphere.  The molecule appears with a steady gradient, progressively ranging from high electron density on the larger end to low electron density on the smaller end. HCl appears as a small sphere fused with a larger sphere.  The molecule appears with a steady gradient, progressively ranging from mostly high electron density on the larger end to low electron density on the smaller end. HBr appears as a small sphere fused with a much larger sphere.  The molecule appears with a steady gradient, progressively ranging from medium electron density on the larger end to low electron density on the smaller end. HI appears as a small sphere fused with an even larger sphere.  The molecule appears with a slight gradient, ranging from medium electron density on the larger end to low-medium electron density on the smaller end.
Charge separation in the hydrogen halides. In HF, the strongly electronegative F pulls much of the electron density away from H. In HI, the I, being much less electronegative than F, does not attract the shared electrons as strongly and, consequently, there is far less polarization of the bond.

How do you interpret the fact that there is no red in the HBr and HI representations?