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© Boardworks Ltd of 17 Resistant Materials Metals These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page. This icon indicates that the slide contains activities created in Flash. These activities are not editable. For more detailed instructions, see the Getting Started presentation. © Boardworks Ltd of 17
© Boardworks Ltd of 17 Learning objectives © Boardworks Ltd of 17 Learning objectives To know where metals come from and how they are obtained. To understand the differences between, and properties of, ferrous and non-ferrous metals and alloys. To understand how the properties of different metals make them suitable for different uses. To know how the properties of metals can be altered by heating.
© Boardworks Ltd of 17 Metals are part of the earth’s crust. Economic, chemical and technological problems have to be solved to obtain them. How desirable a metal is often depends on how scarce it is. Gold diggers dig up tonnes to obtain a few grams, whereas there is so much iron that materials technologists are only interested if they can obtain hundreds of kilograms from each tonne of ore. Where do metals come from?
© Boardworks Ltd of 17 Copper ore is mined, then washed to remove other minerals and unwanted materials. It is heated in a furnace and the molten copper is run off. This process is known as smelting. Where do metals come from? Pure metals like copper form part of the earth’s crust as metal ore.
© Boardworks Ltd of 17 Extracting metals – smelting
© Boardworks Ltd of 17 Aluminium is the most plentiful metal found in the earth’s crust, and is in high demand because it is both light and strong. Aluminium is extracted from aluminium oxide (bauxite) by electrolysis. Electricity passes between the electrodes and pure aluminium forms at the cathode. Extracting metals – electrolysis molten aluminium metal cathode lining carbon anode
© Boardworks Ltd of 17 Ferrous metals are metals which contain iron. They will corrode if unprotected. Ferrous metals will be attracted by a magnet. Non-ferrous are metals which do not contain iron. Pure metals such as aluminium, copper, tin and lead are non- ferrous, and do not rust. Ferrous and non-ferrous metals Metals can be classified into three groups: ferrous metals, non-ferrous metals and alloys. Alloys are metals which are a mixture of two or more metals, benefiting from the properties of both. For example, brass is an alloy of copper and zinc.
© Boardworks Ltd of 17 Types of metals
© Boardworks Ltd of 17 Examples of ferrous metals
© Boardworks Ltd of 17 Non-ferrous metals
© Boardworks Ltd of 17 Examples of alloys
© Boardworks Ltd of 17 Random alloy generator
© Boardworks Ltd of 17 Heat treatment – annealing
© Boardworks Ltd of 17 Heat treatment – hardening steel
© Boardworks Ltd of 17 Heat treatment – tempering
© Boardworks Ltd of 17 Metals are commercially available in a range of stock shapes and sizes. Market forms of metals channel angle square tube round tube flat strip sheet round rod square rod hexagonal rod octagonal rod
© Boardworks Ltd of 17 Key points © Boardworks Ltd of 17 Key points Metals are extracted from the earth’s crust. Iron ore is smelted to obtain iron, while aluminium is obtained by electrolysis. Ferrous metals come from iron ore and include cast iron and steel. Non-ferrous metals include aluminium, copper and tin. Alloys such as brass and stainless steel are formed from two or more metals and other elements. Heating metals alters their properties. Annealing involves heating a metal and then allowing it to cool, which makes the metal more workable. Tempering steel makes it less brittle.
29/05/2014 Reactivity of Metals. 29/05/2014 Reactions of metals with oxygen When a metal reacts with oxygen it will form a METAL OXIDE. This is what happens.
Metals Standard Grade Craft & Design. Metals: A definition Metals form the major portion of the Earth’s elements. Metals are categorised as Ferrous or.
1 of 22© Boardworks Ltd 2011 Extracting Metals by Electrolysis.
Extraction of metals Only some unreactive metals such as silver, gold and platinum can occur freely in nature. Most metals react with other elements to.
© Boardworks Ltd of 20 © Boardworks Ltd of 37 KS3 Chemistry 9H Using Chemistry.
© Boardworks Ltd of 19 These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page. This icon indicates that.
© Boardworks Ltd A slide contains teachers notes wherever this icon is displayed - To access these notes go to Notes Page View (PowerPoint 97) or.
METALS Learning Objectives: What is METAL? Different Types of Metals – Ferrous, Non-Ferrous, Alloys Main focus of Ferrous Metals Properties of Metals Characteristics.
Chapter 19 Section 1. Metals Properties of Metals Where do you find metals on the periodic table? Where do you find metals on the periodic table? Left.
© Boardworks Ltd of 15 These icons indicate that teachers notes or useful web addresses are available in the Notes Page. This icon indicates the.
METALS.. METALS: Popularly, the name is applied to certain hard, fusible metals, as gold, silver, copper, iron, tin, lead, zinc, nickel, etc and also.
© Boardworks Ltd of 21 These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page. This icon indicates that.
Subatomic particles Electron Proto n Neutro n Nam e SymbolCharge Relative mass Actual mass (g) e-e- p+p+ n0n / x x 10.
SEE HOW THEY REACT!!. Metals (3.1) What objects are made of metal? What are the appearance and feel of metals? Do metals conduct? Which metal is normally.
High Frequency Words List A Group 1. the of and.
Objectives Define a mineral. What is a mineral? Describe how minerals form. Identify the most common elements in Earths crust. –mineral –crystal –magma.
Of. and a to the in is you that it at be.
Syllabus Elements of physical metallurgy of non-ferrous metals- classification, physical, chemical and mechanical properties of some important aluminium,
Classification of Matter. Now that we have defined chemical and physical properties of matter, we can use that to help us classify it. One way chemists.
The. of and a to in is you that it he for.
The. of and a to in is you that it he was.
A Matter of Fact Mixtures, Elements and Compounds.
Unit 2/B: Chemical Interactions Chapter 5: Atomic Structure and the Periodic Table Chapter 6: Chemical Bonds and Compounds Chapter 7: Chemical Reactions.
Chemical Bonding. Why the noble gaes are so noble… The elements in group 18 are known as the noble gases. They are completely unreactive The other elements.
STEEL COST WEIGHT BENDING DENSITY MAGNETISM ALUMINIUM CORROSION FORMABILITY HARDNESS DURABILITY SIMILARITIES METALS CONDUCT ELECTRICITY AND HEAT PRESSURE.
Teachers Notes This sequence of slides is designed to introduce, and explain, the different types of variables (categoric, ordered, discrete, continuous),
© Boardworks Ltd of Monitoring and Evaluating Customer Service Unit 2: Developing Customer Relations 2.4 Monitoring and Evaluating Customer.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu How to Use This Presentation To View the presentation as a slideshow.
Difference & similarity Comparing & Contrasting - Rubber is flexible, whereas glass is brittle. - Carbon is an element, while carbondioxide is a compound.
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