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Summer Term Chemistry Recap 2020, Method's of Separation, Reactions…
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The reactivity series is a series of metals, in order of reactivity from highest to lowest. It is used to determine the products of single displacement reactions, whereby metal A will replace another metal B in a solution if A is higher in the series.
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There are 118 different types of atoms called elements and
these are arranged in a chart called the periodic table.
An element is a substance that cannot be broken down into any other substance. There are about 100 elements, each with its own type of atom.
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A chemical compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds.
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A mixture contains two or more substances that are mixed together but have not reacted with each other. A solution is a special type of mixture that is made when a solid dissolves and mixes in a liquid. Mixtures are either homogenous or heterogeneous.
Elements that easily take part in a chemical reaction are considered as reactive and those that do not are unreactive.
Some metals occur naturally in nature e.g. gold, silver and platinum and others are found as ores e.g. iron, copper, tin and lead. The reactivity series can help us to predict how difficult it will be to separate/extract a metal from its ore.
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Humans rely on burning fossil fuels to power, and planes and warm homes.
Pollutants such as sulfur dioxide and nitrogen dioxide released into the air dissolve in rain water to form strong acids which we call acid rain.
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