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GCSE Chemistry

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The periodic table

The periodic table

The periodic table shows all the different elements that are in existence. In the periodic table, elements with similar properties ...

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Structural isomerism of alkanes

Structural isomerism

Isomerism is defined as the existence of molecules with the same molecular formula but different arrangement of atoms in space. ...

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Separating mixtures

Separating mixtures

There are many experimental techniques for the separation of mixtures, and we will explore these in this chapter. The techniques ...

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Rusting of iron

Rusting of iron

Rusting occurs when iron is exposed to oxygen and water. Iron reacts with the oxygen and water to produce hydrated ...

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Relative formula mass

Relative formula mass

The relative formula mass (Mr) is the mass of a compound and can be calculated using the relative atomic masses ...

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Reactivity series

Reactivity series

A reactivity series is a list which places metals into an order of their reactivity. Reactivity of metals is determined ...

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Preparation of salts

Preparation of salts

Salts are ionic substances which are formed as a reaction between an acid and a metal or metal compound. Reactions ...

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Rate of reaction

Rate of reaction

We can predict the effect of changes in factors, such as surface area, temperature, concentration and the use of a ...

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Percentage yield

Percentage yield

The actual yield of a reaction is the actual mass of the product obtained. The predicted yield is the amount ...

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Molecular formula

Molecular formula

What is Molecular Formula The molecular formula tells us the actual number of atoms of each element present in the ...

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Molar volume of a gas

Molar volume of a gas

The volumes of gases and liquids are often measured in cubic decimetres (dm) in chemistry. A decimetre is equivalent to ...

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Metallic bonding

Metallic bonding

Metallic elements are found on the left side and middle of the periodic table. A piece of a metal is ...

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Molar enthalpy change

Molar enthalpy change

Although the heat energy change (Q) tells us the amount of heat energy transferred to or absorbed from the surroundings, ...

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