Ch.10 - Molecular Shapes & Valence Bond TheoryWorksheetSee all chapters
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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

Solution: Tetrahedral shape of CCl4.In the space-filling model, what determines the relative sizes of the spheres?

Problem

A tetrahedron is a pyramid shape, with four equivalent triangular faces.  A ball-and-stick model of CCl4 shows a C at the center of the pyramid with single bonds to Cls at each of the four points of the tetrahedron.  All C-Cl bond lengths are 1.78 angstroms, and all Cl-C-Cl angles are 109.5 degrees. A space-filling model shows a central sphere fused to four other spheres.  A three-dimensional atomic model shows a central C single bonded above and right, angled down, to Cl.  C is also single bonded via a solid wedge below to Cl as well as via a dashed wedge left, angled down.

Tetrahedral shape of CCl4.

In the space-filling model, what determines the relative sizes of the spheres?