18th May 2012 Lewis diagrams and shapes of molecules

Slides:

Advertisements

Similar presentations

Chemical Bonding and Interactions

Advertisements

Lewis Dot Structures Dots are arranged around an element’s symbol to indicate the valence electrons Reminder: valence shell only has s & p orbitals  maximum.

Drawing Lewis Structures and VSEPR. Draw basic Lewis dot structures of atoms and compounds. Using VSEPR, predict bond shape from electron arrangement.

Drawing Lewis Structures and VSEPR. Draw basic Lewis dot structures of atoms and compounds. Using VSEPR, predict bond shape from electron arrangement.

Wednesday, Feb. 19 th : “A” Day Thursday, Feb. 20 th : “B” Day Agenda  Collect homework: pg. 198: 1-14  Collect lab: “Nonmetal Reaction”  Sec. 6.1.

Drawing and Naming Molecules Lewis Dot Structures and Multiple Bonds.

Drawing Lewis diagrams. Lewis diagrams, also called electron-dot diagrams, are used to work out how electrons are shared in a molecule. Once we know the.

AIM: How to write Lewis Dot Structures (Electron Dot Structures) DO NOW: 1. READ BOTH SIDES OF THE HANDOUT. 2. WRITE THE ELECTRON CONFIGURATION (ORBITAL.

Lewis Diagrams.

HOW TO DRAW LEWIS STRUCTURES! A STEP BY STEP TUTORIAL Kyla Smart Michael Burnette Nick Ryan Lor Ross Sison.

2.9 Another look at Bonding – Lewis Diagrams (Section 8.2 pg )

Writing Lewis Structures for Molecular (Covalent) Compounds 1.sketch arrangement of atoms (determine central atom) 2.determine number of valence e - 3.place.

Chemical Bonding Joining atoms together to make compounds.

Objectives  I can draw simple Lewis structures of molecules.

Drawing Lewis Structures and predicting formulas of covalent compounds.

Electrons Valence Electrons Bohr Models Lewis Dot Structures.

LEWIS STRUCTURES. How to draw Lewis structures for Neutral molecules 1. Determine the total valence electrons for the molecule. Find the # of valence.

Chemistry Notes Dot Diagrams Ionic Bonding Diagrams.

Chapter Molecular Compounds 8.2 The Nature of Covalent Bonding.

Tuesday 10/19/10.  Return Naming Compounds Quiz  Collect Symbol Me Projects  Lewis structures  Metallic Bonding  Hydrogen Bonding  Jeopardy Review.

 1. count the total electrons by adding the valence electrons of each atom (if there is a charge add or subtract electrons to account)

Covalent Compounds. Resonance Resonance structures are those that occur when it is possible to draw two or more valid electron dot structures that have.

4.1 Lewis Theory of Bonding. Types of bonding conditions between elements Low Electronegativity and low Ionization energy (Metals) High electronegativity.

 Answer the following questions in full sentences (include question in answer) so that they form notes. 1.Why do atoms bond together? 2.What are 3 ways.

Lewis Dot Diagrams for Covalent Molecules. 3 Types of Representations 1. Lewis structures of compound 2. molecular formula: H 2 3. structural formula:

Step 1 Identify the central atom and draw it’s Lewis structure This is the element with the lowest number of atoms in the formula Draw a Lewis dot diagram.

Drawing Lewis Structures of Molecules Chapter 4 Section 4.

Another look at Bonding – Lewis Diagrams

IONIC Lewis Dot Diagrams

Drawing Lewis Structures and VSEPR

Drawing Lewis Structures and VSEPR

Adapted from Mrs. LaRose, 2008

4.1 Lewis Theory of Bonding

AIM: How to write Lewis Dot Structures (Electron Dot Structures)

Chemistry 141 Monday, November 6, 2017 Lecture 26

Electrons move rapidly around the nucleus in areas called shells.

Do Now: Re-arrange the following rules in the correct order:

Ionic Bonding Test Scale

Formation of Ionic Compounds

To Do 7th Lon-Capa assignment due Friday, April 8th by 10 pm.

Electron Dot and Structual Diagrams for Covalent Compounds

Lewis Structures.

Drawing Lewis Structures Writing Lewis Dot Structures

Chapter 6-2 Lewis Structures (p. 206 – 207).

Chemistry 141 Wednesday, November 8, 2017 Lecture 27

Section 5.2—Drawing Molecules

Drawing molecules using Lewis Dot Structures

Drawing Lewis Structures (electron dot diagrams)

Section 5.3—Molecules in 3D

COVALENT BONDING.

Electron Dot Diagram Find your element on the periodic table.

What You Know: Valence Electrons are the electrons in the highest occupied energy level of an atom You can tell the number of valence electrons from.

Electron Dot Diagram Find your element on the periodic table.

6.4 LEWIS STRUCTURE DIAGRAMS

Valence Electrons and bonding

Lewis-dot Structures.

Chemical BONDING.

Shapes of molecules and ion

WARMUP Name the following compounds. PO6 HBrO3 CuCr2O7

Drawing Lewis Structures and VSEPR

Valence Shell Electron Pair Repulsion

AIM: How to write Lewis Dot Structures (Electron Dot Structures)

I. Lewis Diagrams (p. 202 – 213) Lecture 2.

Valence Shell Electrons are all that matter in bonding.

Electron Dot Diagram Find your element on the periodic table.

I. Lewis Diagrams (p. 202 – 213) Lecture 2.

AIM: How to write Lewis Dot Structures (Electron Dot Structures)

Electron Dot Diagram Find your element on the periodic table.

Lewis Structures.

Presentation transcript:

18th May 2012 Lewis diagrams and shapes of molecules AIM – to revise drawing Lewis structures

Rules for drawing Lewis diagrams Calculate the total number of valence electrons of all the atoms in the compound (care to account for ions) Write the atom symbols in their approximate positions (put ion structures in square brackets with the charge on the outside) Place one pair of electrons where there is a bond Arrange electrons around the outer atoms first and then the central atom Count the electrons around each atom. Shift electrons to make multiple bonds so that all atoms have a full outer shell of electrons and all valence electrons are paired.

Exceptions to the rules Phosphate ion PO43-

Chlorate ion ClO4-

Quiz: (Movie) The Hunger games Who is the game maker of the 75th Hunger games?