Catalyst

CatalystDraw the ionic compound that results from combining Magnesium and Chlorine.Draw the ionic compound that results from combining Calcium and Permanganate (MnO4-)EndHomework Review and Entry Slip

Entry TicketWhat is the compound that forms between barium and oxygen?What is the compound that forms between magnesium and NO3-1?How are crystal lattices arranged?Rate Yourself!Using your exit ticket score, rate yourself 1 4 on LT 2.1, 2.2, 2.3, and 2.4Million Dollar Ionic Pyramid

2.4.Ionic Million Dollar Pyramid Handout*

WHAT ARE THESE THINGS?

Organic Chemist

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+Peer TutorsPeriod 1: Sindi, Ana, Trent, Daisy, Lesley, Jonathon, MarthaPeriod 2: Kimberly, Cinthia, BerenicePeriod 3: Christian, Jose, Camden, JosiasPeriod 4: Janai, Janalee, Martin, GisellePeriod 6: Araceli, Victor, Jasmine+LECTURE 2.3 CRYSTAL LATTICES, COVALENT BONDS, & LEWIS STRUCTURESTodays Learning TargetLT 2.4 I can explain how electrostatic attractions lead to the formation of visible salt crystals. In this explanation, I can incorporate the idea of electrostatic attraction, positive charge, and negative charge. How do ions arrange themselves in salt crystals?I. Crystal LatticeIonic compounds arrange charged ions in repeating pattern to form crystal lattices.Salt crystals that we see are repeating structures of a very simple unit.NaCl Structure.+++++----II. Electrostatic AttractionPositive ions are attracted to negative ionsThis attraction holds crystal lattices together.This attraction is known as electrostatic attractionElectrostatic Attraction

SUMMARIZETodays Learning TargetsLT 2.6 I can identify a compound containing a covalent bond and discuss how electrons aid in the formation of covalent bonds. LT 2.7 For a given covalent compound, I can draw a Lewis Dot diagram for the compound and explain how it illustrates the covalent bond. What are covalent bonds?Chemical BondingIonic BondsMetallic BondsCovalentBondsI. Covalent BondingThis is a bond between only non-metals.In a covalent bond, the electrons are shared between the elements so that each can get an Octet.Most molecules in biology are covalent compoundsCOVALENT BONDS PLAY WELL TOGETHERHow do you show electrons being shared?Covalent Bonds Share!II. Electronegativity and Covalent BondingBecause electrons are not completely transferred, covalent bonds form between molecules that have similar electronegativitiesThis is why metals cannot form covalent bonds.Lewis Structures for Ionic BondsNaClLewis Structures for Ionic Bonds[Na]+[Cl]-Chemical BondingIonic BondsMetallic BondsCovalentBondsII. Drawing Lewis StructuresHalogens and hydrogen form only one bond and are located at the end of a molecule. The central atom is always carbon (if it is present) and/or the element that has the lowest electronegativity.Class ExampleDraw the Lewis structure for H2SMy Turn!Draw the structure for NH3Stop and JotDraw the Lewis structure for C2H6III. Single, Double and Triple BondsElements can share more then one set of electrons.They can also form double and triple bonds.Single bond = 2 electrons Double bond = 4 electronsTriple bond = 6 electrons

Class ExampleDraw the Lewis Structure for CH2OMy Turn!With your table, draw the structure of C2H2Stop and JotDraw the structure of HCN SUMMARIZECollaborative Activity:Investigate and CheckAt your table number off 1 through 4Odd numbers (1 & 3) will solve problems in the left column. Even numbers (2 & 4) will solve problems in the right columnAfter a pair solves a problem they will pass the problems to another pair to check that they did the problem correctly.Work through the problems inorder.Practice Benchmark and Good NewsNo history of scientists! (That means you dont have to remember what Thomson, Bohr, Rutherford, and Dalton said) You still have to know how to solve problems using their concepts though!

Breakdown of questions on next slide!

Practice benchmark will be given Thurs/Fri as your quiz for Unit 2 to test how well you would do on your benchmark. Prepare for it!Practice Benchmark and Good News

STOP LIGHT CARDSTake your index card and color in a stop light exactly like this:On the reverse side, shade it in blue!

As class goes on, you will put the paperclip on the color that corresponds to your level of understanding!Note TakingTake notes using the powerpoints/video lectures, or complete your in class notes (if you choose to take them)!

Exit TicketDraw the Lewis structure for H2ODraw the Lewis structure for NH3Draw the Lewis structure for HCNRate Yourself!Using your exit ticket score, rate yourself 1 4 on LT 2.1, 2.2, 2.3, 2.4, 2.6, and 2.7Closing TimeHomework 2.4 Lewis Structure PracticeUnit 2 Test Soon!