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The Language of Chemistry

Elements

An element, such as iron, is made of atoms. Each element has its own particular atom. An atom of one element cannot be changed into the atom of another element by any chemical process.

There are 103 different elements. In these chapters you will be studying 1 of them.

Atoms

An atom is the smallest part of an element. It cannot be divided (broken) into anything smaller.

Atoms are very tiny. A few million atoms would be needed to cover this full stop.

In the following chapters the atoms of the elements you will be studying have been colour coded. You will notice that the atom of hydrogen is smaller than the other atoms.

The following table shows you the colour codes for the atoms used in the chapters:

Atom

Chemical Name

hydrogen atom

hydrogen

oxygen atom

oxygen

nitrogen atom

nitrogen

sulphur (or sulfur) atom

sulphur (sulfur)

carbon atom

carbon

chlorine atom

chlorine

sodium atom

sodium

potassium atom

potassium

iron atom

iron

copper atom

copper

calcium atom

calcium

aluminium atom

aluminium

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