Giant ionic structures

Figure 3.l5d shows only a tiny part of a small crystal of sodium chloride. Many millions of sodium ions and chloride ions would be arranged in this way in a crystal of sodium chloride to make up the giant ionic structure. Each sodium ion in the lattice is surrounded by six chloride ions, and each chloride ion is surrounded by six sodium ions. 

Giant ionic structure A lattice held together by the electrostatic forces of attraction between ions. 

Tlve ions in the giant ionic structure are always arranged in tire same regular way - see die diagram. 

The giant ionic structure is held together by the strong attraction between the positive and negative ions. It takes a lot of energy to break down the regular arrangement of ions. 

In ionic crystals, ions of oppositely charged ions are held together by strong electrostatic forces of attraction. These crystals are giant ionic structures and no single molecule exist. Some of the common properties are -... 

Since ionic compounds exist as giant ionic structures (Chapter 4) the concept of a molecule cannot be applied. The formula of an ionic compound is therefore an empirical formula, representing the ions present in their simplest ratio. 

The ions form a giant ionic structure, with two chloride ions for each magnesium ion. The formula of magnesium chloride is therefore MgQ2. The compoimd has no overall charge. Can you explain why ... 

Group A—giant ionic structure Group B—giant covalent structure Group C—molecular structure... 

Ionic lattices have a three-dimensional arrangement of alternating positive and negative ions. Compounds with ionic lattices are sometimes called giant ionic structures. 

At the start of Period 3, the ionic chlorides of sodium (NaCl) and magnesium (MgCy do not react with water. The polar water molecules are attracted to the ions, dissolving the chlorides by breaking down the giant ionic structures. The solutions formed contain the positive metal ions and the negative chloride ions surrounded by water molecules. The metal ions and the chloride ions are called hydrated ions ... 

The elements sodium and chlorine react together to form the compound sodium chloride, which has a giant ionic lattice structure. 

The diagram shows a model of the structure of sodium chloride and similar ionic crystals. The ions are arranged in a regular lattice structure - a giant ionic lattice. 

Perhaps the most common example of an ionically bonded substance is NaCl, or table salt. In this, the sodium (Na) atom gives up an electron to the much more electronegative chlorine (Cl) atom, and the two atoms become ions, Na and Cl. The electrostatic bonding force between the two oppositely charged ions extends outside the local area attracting other ions to form giant crystal structures. For this reason most ionically bonded materials are solid at room temperature. 

The solutes whose structure in the solid is a giant ionic lattice give strongly conducting solutions whose colligative properties place them in category (a). Colours of ionic solutions... 

Ions highly conducting, coUigative properties considerably greater than expected. X-ray structure showing a giant ionic lattice. 

All ionic substances consist of ions arranged in a giant lattice. Different ionic structures have their ions arranged in different patterns. The sodium chloride structure is one of the simplest arrangements. 

Copy and complete the table below to compare the properties of giant ionic, giant molecular, giant metallic and simple molecular structures. 

Fourtypes of structure are giant molecular giant ionic giant metallic simple molecular... 

Structure giant ionic giant ionic giant ionic giant covalent simple molecular simple molecular... 

Notice the high melting points of the giant ionic and giant covalent structures, leading to the use of ... 

There are three types of giant structure - ionic, metallic and macromolecular. a Sodium nitride is an ionic compound. Draw a diagram that shows the formula of the compound, the charges on the ions and the arrangement of the valency electrons around the negative ion. 

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