Do Now Why do atoms form chemical bonds, and what happens during the bonding process?

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Presentation transcript:

Do Now Why do atoms form chemical bonds, and what happens during the bonding process?

Ionic Bonding and Ionic Compounds Chapter 6

Essential Question What are the three main types of bonds and how are they different?

Chemical Bonds Chemical bonds: the attraction that holds two elements together (involves valence electrons). Compound: two or more elements chemically bonded together.

3 Main Types of Bonds Ionic Bond Covalent Bond Metallic Bond

Ionic Bonds Ionic bond: formed between two (or more) elements by the transfer of electrons. Formed between a metal & nonmetal. Ion: a charged atom Cation = positive (+) charge Anion= negative (-) charge

Naming Ionic Compound The cation (positively charged ion) keeps its name The anion (negatively charged ion) changes the end of its name to ide

Ionic Compound All compounds have an overall charge of zero. Cations give their electrons to anions in an ionic bond: CATIONS ARE ALWAYS LISTED FIRST Na+ ion + Cl- ion → SodiumChloride (NaCl) Mg+ ion + O- ion → MagnesiumOxide (MgO) Mg+ ion + Cl- ion → MagnesiumChloride (MgCl2)

Writing Ionic Formulas Simple Rule: balance out the (+) and (-) ion charges so they equal to zero. Na1+ + Cl1- Mg2+ + O2- Mg2+ + Cl1-

Characteristics of Ionic Bonding Ionic compounds are arranged in an orderly form known as a crystal lattice They are held together by the oppositely charged ions. In a solid state, the lattice arrangements, the ionic compound cannot conduct electricity. In a liquid or solution, the ions are released and are able to conduct electricity.