Chemical Bonding and Molecular Structure Chapter 12 Sec 12.8 - 12.10.

Slides:

Advertisements

Similar presentations

MOLECULAR SHAPE HOW DOES SHAPE AND POLARITY DETERMINE FUNCTION AND PROPERTIES OF MOLECULES?

Advertisements

How is VSEPR theory used to predict molecular structure?

Molecular Shape VSEPR (Valence Shell Electron Pair Repulsion) Theory.

Polarity and Intermolecular Forces Molecular Geometry.

Drawing Lewis structures

Lewis Dot Structures and Molecular Geometry

SHAPES OF MOLECULES. REMINDER ABOUT ELECTRONS  Electrons have negative charges  Negative charges “repel” each other  In molecules, electrons want to.

Highland Science Department Molecule Shapes Why do these molecules have such different shapes?

Molecular Geometry VSEPR - Valence Shell Electron Pair Repulsion Theory. In small molecules, electrons and bonds are arranged as far apart as possible.

MOLECULAR GEOMETRY VSEPR ACTIVITY. CARBON DIOXIDE Chemical formula: CO 2 # of atoms bonded to central atom: 2 # of lone pairs on central atom: 0 What.

Chemical Bonding and Molecular Structure Chapter 12 Sec Chapter 12 Sec

VSEPR Model And Hybridization. VSEPR Model Valence Shell Electron Pair Repulsion Model a simple model that allows for the prediction of the approximate.

V alence S hell E lectron P air R epulsion Theory Planar triangular Tetrahedral Trigonal pyramidal Bent.

Unit 6 Notes – Part II Mr Nelson Bonding & Lone Pairs Electron pairs that are shared are called bonding pairs Electron pairs that are not bonded.

HW: Read pages Draw the Lewis structure, write the formula, and indicate the shapes for the following compounds: Silicon tetrabromide Hydrogen.

Monday and Tuesday March 26 and 27. Lewis Dot Structures.

Aim: How do chemists use molecular geometry to predict polarity? Metallic bonding Polarity of water and "hydrogen bonding“ Water.

Molecular Shapes and Polarity 2. Valence Shell Electron Pair Repulsion Theory Also known as VSEPR A theory based on the repulsive forces between valence.

1 VSEPR: stands for... l V alence S hell E lectron P air R epulsion l Predicts the 3d shape of molecules. l The name tells you the theory: –Valence shell.

Lewis Symbols and the Octet Rule Electron Dot Symbols convenient way of showing the valence electrons of atoms. Consists of the chemical symbol and one.

Molecular Geometry VSEPR Theory.

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.

Covalent Molecules. Lewis Structures only show us the 2-Dimensional shapes. Not the 3-D molecules we see in the real world This 3-D shape is important.

Covalent Compounds Chapter Covalent Bonds. Covalent Bond The sharing of electrons between atoms Forms a molecule To have stable (filled) orbitals.

Chapter 5 Section 3 Notes The chemical bond formed when two atoms share electrons is called a covalent bond. Except for noble gases, nonmetals can bond.

POLARITY. Polar Molecules l A polar molecule is a molecule with one end having positive electrical charge and the other end having negative electrical.

Chapter 2 MOLECULAR GEOMETRY AND CHEMICAL BONDING THEORY Done By Mrs. Fatima Itani.

Chapter 8 “Covalent Bonding” Part 3 Ball-and-stick model.

Chapters 8 , 9 & 22: Covalent Bonding and Naming Compounds

V alence S hell E lectron P air R epulsion Theory Planar triangular Tetrahedral Trigonal pyramidal Bent.

Valence Shell Electron Pair Repulsion Theory

Chapter 6 The Shape of Molecules.

Chapter 9 Molecular Shape.

Molecular Shapes.

6.8 Shapes and Polarity of Molecules

Chapter 6 The Shape of Molecules.

Chapter 6 –The Shape of Molecules

Molecular Geometry VSEPR Theory- “Valence- shell, electron-pair repulsion” states that repulsion between the sets of valence-level electrons surrounding.

Chapter 8 Covalent Bonding 8.3 Bonding Theories

Polar vs. Non-Polar Molecules

Valence Shell Electron Pair Repulsion Theory

Molecular Geometry (VSEPR)

Valence Shell Electron Pair

Ch. 6.5 Bonding Theories Molecular Geometry.

Valence Shell Electron Pair Repulsion Theory (VSEPR)

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

MOLECULAR GEOMETRY Bonding Unit.

Molecular Geometry VSEPR and beyond!.

The VSEPR Theory Section 4.3.

O = O V___________ S________ E________ P______ R____________

Molecular Shapes VSEPR Theory

Molecular Geometry and VSEPR Theory

Important Information:

Chapter 8 Covalent Bonding 8.3 Bonding Theories

Chapter 8 Covalent Bonding 8.3 Bonding Theories

Although all covalent bonds involve a sharing of one or more pairs of electrons between bonding atoms, most of the time this sharing is not equal. One.

Chapter 10 Properties of Solids and Liquids

Molecular Geometry VSEPR Theory- “Valence- shell, electron-pair repulsion” states that repulsion between the sets of valence-level electrons surrounding.

Molecular Structure and Shape

Polar Molecules Link to Phet Polar Molecules.

Objectives To understand molecular structure and bond angles

Molecular shapes.

Dipoles and Polar Molecules

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic Orbitals Chapter 10 Copyright © The McGraw-Hill Companies, Inc. Permission required.

Molecular Geometry.

Molecular Shapes VSEPR Model

Molecular Geometry.

Presentation transcript:

Chemical Bonding and Molecular Structure Chapter 12 Sec

Goals: 1.To use Lewis Structures as a way to predict the geometry of Molecules 2.Determine if molecules are polar or nonpolar

VSEPR Model Valence Shell Electron Pair Repulsion Model Bonds (pairs of electrons) attempt to move as far away as possible from one another in a molecule

This explains the Geometry of H 2 O Water is a “bent” molecule, because of the lone pairs around the central Oxygen atom

Various Geometry of Molecules See Examples on Next Slides (Hand-Out)

Polar or Non-polar Molecule? A molecule may have polar covalent bonds and not be polar overall ????????? Geometry must also be considered

Ammonia (NH 3 ) is polar 1.The bonds between hydrogen and nitrogen are polar covalent (∆EN =.87) 2.Pyramidal geometry of molecule points charges toward N

Carbon Dioxide is Non-polar Even though the bonds between carbon and oxygen are polar covalent (∆EN = 1.0), the pull of electrons is in equal and opposite directions because CO 2 is linear

Water is Wacky! Water has some strange properties due to its structure