What you’ll learn5 learning objectivesChoose one objective for a focused lesson, or study the complete topic.9.3.1An alloy as a mixture of a metal with• Describe an alloy as a mixture of a metal with other elements, (a) brass as a mixture of copper and zinc (b) stainless steel as a mixture of iron and other elements such as chromium, nickel and carbonSyllabus objective9.3.2Alloys can be harder and stronger than• State: alloys can be harder and stronger than the pure metals and are more usefulSyllabus objective9.3.3Uses of alloys in terms of their• Describe uses of alloys in terms of their physical properties, including stainless steel in cutlery because of its hardness and resistance to rustingSyllabus objective9.3.4Representations of alloys from• Identify representations of alloys from diagrams of structureSyllabus objective9.3.5Alloys can be harder/stronger than• Explain why alloys can be harder/stronger than pure metals: different-sized atoms stop layers sliding easilySyllabus objective