Slide No. 1Chapter 9: Chemical BondingOverviewWe learn how atomic structure and electron configurations explain how atoms combine into molecules. IntroductionMajor types of chemical bondingValence electrons and Lewis diagrams for atomsIonic Compounds Lewis StructuresLattice EnthalpyMolecular compounds Ionic and Covalent BondsReading:9.1 – 9.5Homework Problems:8(9), 10(11), 20(21a,c), 26(27), 39(40), 50,51, 52(53), 54(55), 57(58) Lecture OutlineSlide No. 29.1 Atomic properties and chemical bondingWhat is chemical bonding?Bonding is the _________or ________of electrons between atoms resulting in new forces that hold the atoms together.Types of bonds ionicbonds (9.2)covalentbonds (9.3)metallicbonds (9.5)Metals+non metalsOnly non metalsOnly metalsGenerally formed between:Electron transferElectron sharingElectron pooling
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Slide No. 3Examples of Bonding TypesClassify the bond interactions in these substances:ExampleIonicCovalentMetalliccopper, Cucarbon monoxide, COcalcium fluoride, CaF2brass (Cu-Zn alloy)potassium sulfate, K2SO4xenon, Xehydrochloric acid, HCllithium niobate, LiNbO3graphite, C9.1 Atomic properties and chemical bondingSlide No. 4Valence Electrons – A ReviewSb[Kr]5s24d105p3Br[Ar]4s23d104p5Si[Ne]3s23p2Cs[Xe]6s1ElementNo. of Valence electronsElectron configurationDefinitions of valence electronsSimplified: "Everything beyond the largest noble gas core"More sophisticated: Electrons in the highest __________________.Filled d10and f14sublevels are __________ from the valence level. Filled d and f sublevels are so stabilizedby being completely filled that they become chemically inert – like part of the "core." How do we figure valence electrons for transition metals?The bonding theory for transition metals is somewhat more complex.We learn about that in CHEM 1036.9.1 Atomic properties and chemical bondingc