Lesson Valence Shell Electron Pair Repulsion Theory (VSEPR)

Slides:

Advertisements

Similar presentations

Chemical Bonding and Interactions

Advertisements

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

Snow Flakes. Naming Binary Covalent Compounds The first element in the formula is named first, followed by the second with the suffix -ide Prefixes are.

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

Chapter 6 – Covalent Compounds Section 3 – Molecular Shapes.

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.

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

MOLECULAR GEOMETRY AND POLARITY

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.

IIIIII Molecular Geometry (p. 232 – 236) Ch. 8 – Molecular Structure.

Molecular Geometry And Polarity.

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

Polarity How does electronegativity affect the polarity of a covalent bond? How does the shape of a molecule affect the polarity of a molecule?

Polarity Chapter 6.1. Review A covalent bond is formed between two non-metals. Electrons are shared. Orbitals are overlapping.

Molecular Geometry – Shapes!

Chemical Fundamentals Review Living things are composed of matter. Matter has mass, occupies space. Atoms composed of: – Small nucleus Proton (positive.

9 - 1 Molecular Geometry Molecules have different shapes (geometries) depending on the type of atoms making it up and the number of electron pairs present.

IIIIII Molecular Geometry Molecular Structure. A. VSEPR Theory  Valence Shell Electron Pair Repulsion Theory  Electron pairs orient themselves so that.

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

How are molecules depicted? Ch. 9, sections 3 & 4.

IIIIII II. Molecular Geometry Ch. 9 – Molecular Structure.

Valence Shell Electron Pair Repulsion Theory –Electron pairs orient themselves in order to minimize repulsive forces.

CHM 108 SUROVIEC SPRING 2014 Chapter 10. I. VSEPR Theory A simple model that we can use to look at molecular shapes is the VSEPR (valence shell electron.

Molecular Geometry. It’s all about the Electrons Electrons decide how many bonds an atom can have They also decide the overall shape of the molecule OPPOSITES.

Objectives VESPR Theory Continue with Lewis dot Drawings.

Warm Up – Name or Write the following compounds

Chapter 6 The Shape of Molecules.

Chapter 9 Molecular Shape.

CHAPTER OUTLINE Electronegativity Polarity & Electronegativity

Chapter 6 Table of Contents Section 1 Covalent Bonds

6.8 Shapes and Polarity of Molecules

Chapter 6 The Shape of Molecules.

Compounds and Their Bonds

CHEMISTRY Matter and Change

Bonding Ionic Covalent 8.4 Bond Polarity Polar Nonpolar.

Valence Shell Electron Pair Repulsion Theory

Polarity, Water and Biological Molecules

Predicting Shapes of Molecules

Valence Shell Electron Pair Repulsion Theory

Ch. 8-3 I Bonding Theories Covalent Bonding.

Molecular Geometry (VSEPR)

Polar Molecules Section 3.3.

VSEPR Model and the Resulting Shapes

MOLECULAR GEOMETRY Topic # 18

Electron Sharing can be EQUAL or UNEQUAL

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

MOLECULAR GEOMETRY Bonding Unit.

Molecular Geometry VSEPR and beyond!.

Molecular Shapes VSEPR Theory

Bonding Unit Part B) Structures and Shapes

Ch. 6 – Molecular Structure

Chemical Bonding.

GEOMETRY AND POLARITY OF MOLECULES

Finishing off Hybridization

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 Structure and Shape

Ch 7.2 Polarity and VSEPR Theory

Molecular shapes.

Naming Binary Covalent Compounds

Polar Vs. Non Polar Molecule Practice

Covalent Bond – An attraction between two atoms caused by the sharing of a pair of electrons between two atoms. Polar Covalent – A covalent bond in which.

Bellwork # What is electronegativity?

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

Molecular Shapes Mrs. Chan.

Molecular Geometry.

Resonance Structures Some molecules are not well described by Lewis Structures. Typically, structures with multiple bonds can have similar structures with.

Valence Shell Electron-pair Repulsion model

Molecular Shapes In order to predict molecular shape, we assume the valence electrons repel each other. Therefore, the molecule adopts whichever 3D geometry.

Presentation transcript:

Lesson 3.4 - Valence Shell Electron Pair Repulsion Theory (VSEPR) Electron pairs repel as much as possible in 3-dimensional space. Theory used to predict shapes of molecules.

To determine the shape of a molecule, we distinguish between lone pairs (or non-bonding pairs, those not in a bond) of electrons and bonding pairs (those found between two atoms). The electrons adopt an arrangement in space to minimize e--e- repulsion.

Examples – Draw the Lewis structures, and then determine the orbital geometry of each: H2S CO2 PCl3 CH4 SO2

Covalent Bond – An attraction between two atoms caused by the sharing of a pair of electrons between two atoms. Polar Covalent – A covalent bond in which electrons are shared unequally. Nonpolar covalent – electrons are shared equally. SYMMETRICAL arrangement of valence electrons.

> 1.5 Ionic 0.5-1.5 Polar covalent < 0.5 Nonpolar covalent Electronegativity – The tendency of an atom in a bond to attract shared electrons to itself. Look at electronegativity difference to determine bond type: EN Difference Bond Type > 1.5 Ionic 0.5-1.5 Polar covalent < 0.5 Nonpolar covalent

Partially Positive Partially Negative

Polar Molecule – A molecule in which valence electrons (bonds and unshared pairs of electrons) are not equally distributed (asymmetrical) To be polar, a molecule must: 1. contain polar covalent bonds 2. be asymmetrical

Examples – Is each molecule polar or nonpolar? CO2 H2S CCl4 NBr3