There are about 100 different elements from which all substances are made. The list of these elements is called the periodic table.
Element: A substance made up of only one type of atom. It is not possible to break an element down into a simpler substance.
Each element is made up of one type of atom.
Atoms are represented by chemical symbols e.g. Na for Sodium or O for Oxygen.
The elements in the periodic table are arranged in columns called groups. The elements in groups usually have similar properties.
Atom: An atom is the smallest particle that can exist on its own.
Element: An element is made up of one type of atom.
Compound: A compound needs two or more atoms or elements chemically bonded.
Mixture: Two or more atoms or compounds which are not chemically bonded (The elements are mixed)
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