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Metals.In this presentation I will talk about some examples of metals such as copper, aluminium, steel and mercury and I will discuss with you their properties and how it relates to their use.

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Introduction

We use metals in many different ways. Our lives wouldn't be the same without them, especially living in a country as industrial as Britain. In this presentation I will talk about some examples of metals such as copper, aluminium, steel and mercury and I will discuss with you their properties and how it relates to their use. Properties of Metals * Both heat and electricity flow easily through all metals; therefore they are good conductors of heat and electricity and this is one of the common ways of distinguishing between metals and non-metals. If we know that a substance conducts electricity, then we are almost certain that it is a metal. The only non-metal that conducts electricity well is a type of carbon called graphite. * Metals have a high tensile strength. ...read more.

Middle

This is because their atoms join up with strong bonds. Mercury is an example of a metal that is liquid at room temperature but we can melt all metals if we heat them enough. * Metals have high densities as they have a lot of atoms packed into a small volume. * Some metals are magnetic. In the periodic table they are only iron, nickel and cobalt. An alloy made up of these three metals will also be magnetic. Steel is made mostly from iron and is also magnetic. * Metals make alloys when mixed with other metals. An alloy is basically a combination of different metals. The properties of the metals get jumbled up in the new alloy so light, weak metals can be mixed with heavy, strong metals. ...read more.

Conclusion

This makes metal stronger. Steel is tough and easily shaped. It is also cheaper than most other metals. Vehicle bodies are usually made of steel. The bad thing about steel is that it rusts. We can make stainless steel (which is an alloy) by mixing iron with two other metals called nickel and chromium. Stainless steel does not rust but it is expensive. Aluminium is a very lightweight metal and it doesn't corrode easily. These two properties make aluminium an important metal but pure aluminium is weak and soft and easy to bend. This means that we can't use it for many jobs but we can mix aluminium with another light metal, magnesium. This will give us an alloy that is stronger, harder and stiffer than aluminium. Most modern coins have no value other than their use in economic exchange and are rarely made from precious metals such as gold or silver if they are intended for use in commerce. Farzana Jalil AS1D ...read more.

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