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ALLOYS
MEANING ,[object Object],[object Object],[object Object]
Example of alloy products. Body parts of a car Golden jewelleries Rims
Arrangement of atoms in Metals ,[object Object],[object Object],When a force is being applied…. The layers can  slide over  each other easily. ,[object Object],[object Object],[object Object],[object Object]
Arrangement of atoms in alloys Pure metal A Pure metal B ,[object Object],[object Object],[object Object]
Arrangement of atoms in alloys Pure metal A Pure metal B
Arrangement of atoms in alloys ,[object Object],[object Object],[object Object],Thus make an alloys  not ductile  and  not malleable  but  harder  and  stronger  than the original constituent metals.
[object Object],[object Object],Experiment  9.1
[object Object],[object Object]
Variables: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Procedure string meter ruler weight ,[object Object],steel ball bearing block of alloy / metal ,[object Object],[object Object],Set up the apparatus as shown in Figure 1 below.
[object Object],[object Object],[object Object],[object Object]
Results 2.5 2.3 2.5 2.4 Brass 3.2 3.3 3.1 3.2 Copper Average 3 2 1 Diameter of dents (cm) Blocks
Conclusion ,[object Object],[object Object]
TEST YOUR UNDERSTANDING ,[object Object],1. Alloys are materials that contain A. only an element. B. two elements only. C. more than one element  D. hydrogen and carbon elements only.
2. Steel is harder than pure iron. This is because the atoms of steel are … A. more difficult to compress. B. More compact. C. More difficult to slide over one another. D. Smaller but heavier.
2. Which of these are the properties of alloys? A. Ductile. B. Malleable. C. Ductile and malleable. D. Not ductile and not malleable.
Sorry, try again. Click here to go to previous question.
Congratulations. You are correct. Click here to proceed
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Congratulations. You are correct. Click here to proceed
[object Object],[object Object],[object Object],[object Object]

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What Makes Alloys Harder Than Pure Metals