1Lecture 24: Chapters 21 and 23 Elements of ChemistryPlanI.Submicroscopic World:Atoms and Molecules II. Physical and Chemical Properties:What is the difference? III. Chemical Compounds and Reactions IV. Chemical Bonding -Ionic Bonds -Covalent Bonds Home Work:zChapter 21zKey Terms zReview questions: 5, 6, 7, 8, 9, 10, 15, 16 zExercises: 10, 13, 14 zChapter 23Key terms Review questions: 1, 4, 7, 9, 12, 16, 17, 19, 24, 28I. Submicroscopic World:Atoms and Molecules Different levels of magnification Macroscopicphysical objects that are measurable and observable by the naked eye. MicroscopicObjects that can be seen and studied with microscopes.SubmicroscopicThe realm of atoms and molecules, where objects are smaller than can be detected by optical microscopes.
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