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Chapter 5: The Structure of Matter. Cool Chemistry Videos. Video One Video Two. Overview. Compounds and Molecules. Ionic and Covalent Bonding Compound Names and Formulas Organic and Biochemical Compounds. Compounds and Molecules.
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Cool Chemistry Videos • Video One • Video Two
Overview • Compounds and Molecules. • Ionic and Covalent Bonding • Compound Names and Formulas • Organic and Biochemical Compounds
Compounds and Molecules • Compounds are a substance made up of two or more different elements joined by chemical bonds. • Molecules are the smallest unit of a substance that keeps all of the physical and chemical properties of that substance; it can consist of one atom or two or more atoms bonded together.
Compound or Not? • He • NaCl • H20 • Ne • O2
Chemical Bonds • The attractive forces that hold different atoms or ions together in compounds. • Chemical bonds distinguish compounds from mixtures.
Why do chemical bonds form? • They form to give elements complete octets. • You can predict which elements might react with one another based on those valence electrons. • Example H2O
Create your own • Predict what some compounds might be. • Based off valence electrons. • Come up with 5 at your table.
Types of Chemical Bonds • Hydrogen Bonding • Ionic Bonds • Metallic Bonds • Covalent Bonds
Ionic Bonding • Are formed by the transfer of electrons. • Usually between a metal and a non-metal • Formed between oppositely charged ions.
Examples of Ionic Bonds • LiCl • KCl • NaCa • Name 3 possible Ionic Bonds
Other Properties of Ionic Bonds • When melted or dissolved in water they form ions and conduct electricity.