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Ionic Lattices

Part of the Structure and Bonding section of Coddy's Chemistry journey. Lesson 6 of 49.

Ions stack in a huge regular pattern, a lattice, each pulled by all its neighbours.

Strong attractions everywhere: high melting points (salt: 801 °C).

Solid: no moving ions, no current. Melted or dissolved: the ions move and it conducts. Brittle, because a shift lines up like charges.

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Challenge

Potassium bromide crystals were once used as a medicine. Describe the bond between potassium and bromine: its type, and which atom ends up negative.

Try it yourself

Bond typeDescribe the bond K–Br
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This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Structure and Bonding

1Ionic Bonding

Why Atoms BondForming IonsThe Ionic BondIonic FormulasPolyatomic IonsIonic LatticesRecap - Salt Factory

4Polarity

Electronegativity and BondsPolar and Non-polar BondsIonic or CovalentPolar MoleculesWhen Dipoles CancelRecap - Dipole Hunt

7Functional Groups

Carbon ChainsStructural FormulasAlcoholsCarboxylic AcidsEsters and EthersAldehydes, Ketones, AminesRecap - Group Finder

2Covalent Bonds

Sharing ElectronsCounting Valence ElectronsDrawing Lewis StructuresDouble and Triple BondsLone PairsFormal ChargeLewis Structures of IonsRecap - Molecule Builder

5Forces Between Molecules

London ForcesDipole-Dipole ForcesHydrogen BondsBoiling PointsLike Dissolves LikeRecap - Boiling Contest

8Practice Problems

Recap - Polar Bonds SurveyRecap - Pigments and HexaneRecap - Butanol and EtherRecap - Dots on an Oxide

3Shapes of Molecules

Electron GroupsLinear and Trigonal PlanarTetrahedral MoleculesPyramids and Bent MoleculesBond AnglesRecap - Shape Detective

6Metals and Giant Structures

Metallic BondingDiamond and GraphiteGiant Covalent StructuresFour Kinds of SubstanceRecap - Material Match