VSEPR THEORY Chemistry. Polyatomic Ions  Ions that are composed of covalently bound atoms.  Add or subtract electrons for charge when finding total.

Slides:

Advertisements

Similar presentations

X. VSEPR Theory – Valence Shell Electron Pair Repulsion theory. [Remember: Like charges repel!] Valence Shell Electron Pair Repulsion theory. [Remember:

Advertisements

VSEPR MODEL Valence Shell Electron Pair Repulsion Model A model for predicting the shapes of molecules and ions in which valence shell electron pairs are.

Basic Chemistry Copyright © 2011 Pearson Education, Inc. 1 Chapter 10 Structures of Solids and Liquids 10.2 Shapes of Molecules and Ions (VSEPR Theory)

1 Chapter 10 Molecular Structure: Solids and Liquids 10.3 Shapes of Molecules and Ions (VSEPR Theory) Copyright © 2008 by Pearson Education, Inc. Publishing.

Molecular Shapes Chapter 6 Section 3. Molecular Structure It mean the 3-D arrangement of atoms in a molecule Lewis dot structures show how atoms are bonded.

Chapter 4 Forces Between Particles

Lewis Structures & VSEPR. Lewis Structure Lewis Structures – shows how the _______________ are arranged among the atoms of a molecule There are rules.

Chapter 8 Shape of molecules. VSEPR- Stands for: Valence-shell electron pair repulsion theory. States that pairs of valence e- arrange as far apart as.

VSEPR Theory Valence Shell Electron Pair Repulsion.

Molecular Shape Section 9.4

Molecular Geometry VSEPR and beyond!. Molecular Geometry Three dimensional arrangment of atoms Molecular polarity determined by geometry and polarity.

Molecular Geometry. 2-D and 3-D Lewis Structures explain the two dimensional structure of molecules In order to model the actual structure of a molecule.

Unit 3: Chemical Bonding

Review Double and Triple Bonds

Section 8.2 The Nature of Covalent Bonding. The Octet Rule Atoms share electrons so they have a filled valence shell. Atoms share electrons so they have.

Resonance  A molecule or polyatomic ion for which 2 or more dot formulas with the same arrangement of atoms can be drawn is said to exhibit RESONANCE.

Chemistry Chapter 9 Notes #3. Representing Molecules Molecular Formula –Ex. CH 4 –Ex. H 2 O Structural/ Lewis Formula Ball & Stick Model Space Filling.

Section 8.3 Bonding Theories. VSEPR Theory Electron dot structures fail to reflect the three dimensional shapes of the molecules. VSEPR Valence Shell.

Copyright©2000 by Houghton Mifflin Company. All rights reserved. 1 Chemistry FIFTH EDITION by Steven S. Zumdahl University of Illinois.

Molecule Shapes VSPR. WHAT IS VSPR? Valence Shell Electron Repulsion The idea states that covalent bonds & lone electron pairs like to stay apart because.

VSEPR Theory Valence Shell Electron Pair Repulsion.

Molecular Shapes Chapter 6 Section 3. Lewis dot structures show how atoms are bonded together, but they often do not illustrate the true shape of a molecule.

Chapter 12 Chemical Bonding. Chapter 12 Table of Contents 12.1 Types of Chemical Bonds (see Part 1) 12.2 Electronegativity (see Part 1) 12.3 Bond Polarity.

VSEPR Theory Valence Shell Electron Pair Repulsion.

Valence Shell Electron Pair Repulsion Theory

Valence-Shell Electron-Pair Repulsion Theory

6.8 Shapes and Polarity of Molecules

Lewis Structure Shows how valence electrons are arranged among atoms in a molecule. Reflects central idea that stability of a compound relates to noble.

Chapter 8 Covalent Bonding 8.3 Bonding Theories

VSEPR and Molecular Geometry

TOPIC: Molecular Geometry (Shapes of Molecules) Essential Question: How do you determine the different shapes of molecules?

Molecular Shape (Geometry)

Molecular Geometry (VSEPR)

Valence Shell Electron Pair Repulsion Theory

Lewis Structures & VSEPR

Valence Shell Electron Pair

Ch. 6.5 Bonding Theories Molecular Geometry.

“The shape of things to come”

Valence Shell Electron Pair Repulsion Theory (VSEPR)

Bellwork Monday Draw the following Lewis dot structures. CCl4 NH4+

Valence Shell Electron Pair Repulsion

MOLECULAR GEOMETRY Bonding Unit.

Molecular Geometry VSEPR and beyond!.

The VSEPR Theory Section 4.3.

O = O V___________ S________ E________ P______ R____________

Localized Electron Model

Valence Shell Electron Pair Repulsion Theory

Section 5.3—Molecules in 3D

Chapter 8 Covalent Bonding 8.3 Bonding Theories

Chapter 10 Molecular Structure: Solids and Liquids

Molecular Shapes: True shapes of molecules

Chapter 8 Covalent Bonding 8.3 Bonding Theories

Valence Shell Electron Pair Repulsion Theory

Valence Shell Electron Pair Repulsion

Chapter 10 Properties of Solids and Liquids

Valence Shell Electron Pair Repulsion Theory

Valence Shell Electron Pair Repulsion Theory

Unit 3: Chemical Bonding

Molecular Shapes It mean the 3-D arrangement of atoms in a molecule

Molecular Geometry.

Molecular Shapes VSEPR Model

Molecular Shapes Mrs. Chan.

Shapes of Covalent Molecules

Molecular Geometry.

Valence Shell Electron Pair Repulsion

Valence Shell Electron-pair Repulsion model

Valence Shell Electron Pair Repulsion Theory

Presentation transcript:

VSEPR THEORY Chemistry

Polyatomic Ions  Ions that are composed of covalently bound atoms.  Add or subtract electrons for charge when finding total NO 3 -1 SO 4 -2 PO 4 -3 OH -1 CN -1 SO 3 -2

Copyright © Cengage Learning. All rights reserved 3  More than one valid Lewis structure can be written for a particular molecule. NO 3 – = 24e – Resonance

Copyright © Cengage Learning. All rights reserved 4  Actual structure is an average of the resonance structures.  Electrons are really delocalized – they can move around the entire molecule. Resonance

VSEPR Theory (Valence Shell Electron Pair Repulsion)  Molecules have a 3D shape  Shape is determined from VSEPR Theory  VSEPR Theory- Valence e - pair repulsions cause atoms to shift as far apart as possible  In other words, atoms and lone pair e - want to stay as far away as possible! Unshared electron pair 107°

Copyright © Cengage Learning. All rights reserved 6 Arrangements of Electron Pairs Around an Atom Yielding Minimum Repulsion

Copyright © Cengage Learning. All rights reserved 7 Structures of Molecules That Have Four Electron Pairs Around the Central Atom

VSEPR Shapes Shape# of Lone Pair e - on the Central Atom # of Atoms Connected to the Central Atom Linear*If only 2 atoms in the entire molecule Linear02 Bent1 or 22 Trigonal Planar03 Pyramidal13 Tetrahedral04

What are the shapes of the following molecules? 1. HF 2. H 2 O 3. PI 3 4. TeO 2 5. SO 3 5. CBr 4 6. CH 2 F 2 7. C 2 H 4 8. BH 3 9. SO 3 -2