7.2 Ionic Bonds and Ionic Compounds - Mr. Walkmrwalk.com/Chapter 7/7.2 Notes.pdf · Slide 13 of 25...

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Ionic Bonds and Ionic Compounds

In many coastal countries

that have warm, relatively

dry climates, salt is

produced by the

evaporation of seawater.

You will learn how cations

and anions combine to

form stable compounds

such as sodium chloride.

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Ionic Bonds and Ionic

Compounds> Formation of Ionic Compounds

Ionic Bonds

The electrostatic forces that hold ions together in

ionic compounds are called ionic bonds.

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Animation 8 Take an atomic-level look at the

formation of KCl.

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Formula Units

•A chemical formula shows the kinds and

numbers of atoms in the smallest

representative unit of a substance.

•A formula unit is the lowest whole-number

ratio of ions in an ionic compound.

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NaCl is the chemical formula for sodium

chloride.

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Conceptual Problem 7.2


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Practice Problems for Conceptual Problem 7.2

Problem Solving 7.12 Solve Problem

12 with the help of an interactive

guided tutorial.

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Compounds> Properties of Ionic Compounds

The coordination number of an ion is the

number of ions of opposite charge that surround

the ion in a crystal.

In NaCl, each ion has a coordination number of 6.

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In CsCl, each ion has a coordination number of 8.

In TiO2, each Ti4+ ion has a coordination number

of 6, while each O2- ion has a coordination number

of 3.

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Ionic compounds can conduct an electric

current when melted or dissolved in water.

7.2

7.2 Ionic Bonds and Ionic Compounds - Mr. Walkmrwalk.com/Chapter 7/7.2 Notes.pdf · Slide 13 of 25...

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