MOLECULAR GEOMETRY Bonding Unit.

Slides:

Advertisements

Similar presentations

Drawing Lewis structures

Advertisements

1 Shapes of Molecules Determined by number of valence electrons of the central atom 3-D shape a result of bonded pairs and lone pairs of electrons Use.

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

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.

Section 12.4 Structure of Molecules 1.To understand molecular structure and bond angles 2.To learn to predict molecular geometry from the number of electron.

B. Ionic bonding and Structures of Ionic Compounds

MOLECULAR GEOMETRY Bonding Unit. VSEPR VSEPR V alence S hell E lectron P air R epulsion theory.V alence S hell E lectron P air R epulsion theory. Most.

Molecular Geometry Chapter 6.5.

VSEPR Theory Valence Shell Electron Pair Repulsion.

Molecular Geometry VSEPR Theory.

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.

VESPR Theory. Molecular Structure Molecular structure – _______________ arrangement of atoms in a molecule.

VSEPR Theory Valence Shell Electron Pair Repulsion.

Valence Shell Electron Pair Repulsion Theory

6.8 Shapes and Polarity of Molecules

VSEPR and Molecular Geometry

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

Molecular Shape (Geometry)

Timberlake LecturePLUS

VSEPR Pronounced vesper…a vespa for her A vest purrs???

ValenceShellElectronPairRepulsion

Ch. 6 – Molecular Structure

Molecular Shapes.

Valence Shell Electron Pair Repulsion Theory

Valence Shell Electron Pair

MOLECULAR GEOMETRY Topic # 18

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 (VSEPR) model:

Valence Shell Electron Pair Repulsion

II. Molecular Geometry (p. 183 – 187)

Molecular Geometry VSEPR and beyond!.

The VSEPR Theory Section 4.3.

O = O V___________ S________ E________ P______ R____________

Valence Shell Electron Pair Repulsion Theory

Daily Science Draw the Lewis structure for NO2-1 . How many sigma and pi bonds does it have? Draw the Lewis structure for the following and tell how.

Important Information:

Molecular Structure Molecular Geometry.

Chapter 10 Molecular Structure: Solids and Liquids

Molecular Shapes: True shapes of molecules

Valence Shell Electron Pair Repulsion Theory

Valence Shell Electron Pair Repulsion

Chapter 10 Properties of Solids and Liquids

Shape of the Molecule Use VSEPR Theory

Objectives To understand molecular structure and bond angles

Molecular shapes.

Valence Shell Electron Pair Repulsion Theory

5.1 Molecular Shape Obj 1 Chemistry.

Molecular Structure II. Molecular Geometry.

Molecular Geometry.

II. Molecular Geometry (p. 183 – 187)

Valence Shell electron pair repulsion model 3D models

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

Molecular Geometry.

Molecular Shapes VSEPR Model

Molecular Shapes Mrs. Chan.

Molecular Geometry.

6.5 VSEPR Theory and Molecular Shapes

Valence Shell Electron Pair Repulsion

II. Molecular Geometry (p. 183 – 187)

II. Molecular Geometry (p. 183 – 187)

Valence Shell Electron-pair Repulsion model

Valence Shell Electron Pair Repulsion

Valence Shell Electron Pair Repulsion Theory

Presentation transcript:

MOLECULAR GEOMETRY Bonding Unit

Molecule adopts the shape that minimizes the electron pair repulsions. MOLECULAR GEOMETRY VSEPR Valence Shell Electron Pair Repulsion theory. Molecule adopts the shape that minimizes the electron pair repulsions.

Some Common Geometries Linear Trigonal Planar Tetrahedral

Steps for Predicting Molecular structure using the VSEPR Model Draw the Lewis structure. Count the electron pairs and arrange them in a way to reduce repulsion. Determine the positions of the atoms from the way the electrons pairs are shared. Determine the name of the molecular structure from the position of the atoms.

Rules for Predicting Molecular Structure using the VSEPR Model 2 pairs of electrons on a central atom in a molecule are always placed 180o apart (linear). Three pairs of electrons on a central atom in a molecule are always placed 120o apart on the same plane as the central atom (Trigonal Planar). Four pairs of electrons on a central atom in a molecule are always placed 109.5o apart (tetrahedral).

Rules for Predicting Molecular Structure using the VSEPR Model When every pair of electrons on the central atom is shared with another atom, the molecular structure has the same name as the arrangement of the electron pairs. Number of Pairs Name of Arrangement 2 Linear 3 Trigonal Planar 4 tetrahedral

Rules for Predicting Molecular Structure using the VSEPR Model When one or more of the electron pairs around a central atom are lone pairs, the name for the molecular geometry is different from the arrangement of electron pairs.

Structure Determination by VSEPR Water, H2O The electron pair geometry is TETRAHEDRAL 2 bond pairs 2 lone pairs The molecular geometry is BENT.

Water, H2O Electron Arrangement= Tetrahedral Molecular Geometry= Bent

Methane, CH4 Electron Arrangement= Tetrahedral Molecular Geometry= Tetrahedral

Ammonia, NH3 Electron Arrangement= Tetrahedral Molecular Geometry= Trigonal Pyramid