Elements of the Periodic table
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- Oxygen 
- 8
- Every material is always made up of one or two elements of the periodic table.  An element is a type of substance that cant be broken down. 
- There are exactly 92 elements. Every element is listed in the periodic table. Every single element has its own symbol to represent the element.
- The smallest part of an element is an atom. All elements are one type of atom. All the atoms in an element are the same. 
- A property of a substance is equivalent to a property of many atoms. It isn't just one single atom. An atom in one element will be different from an atom in another element. 
- A compound is a type of substance made up of atoms for one or two elements which are joined together. Like atoms, the properties of a compound is different to the properties of an element that its made from. 
- A molecule is a group of two or more atoms that are joined together. A formula shows the number of atoms in each element from a compound.
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