Describe an atom.
An atom is the basic building block of all matter.
They are extremely small and cannot be seen even with microscopes.
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Describe Dalton's model of an atom.
Dalton's model of an atom states that:
All matter is made up of atoms.
Atoms of different elements are different.
Atoms of the same element are identical.
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What is an element?
An element is a pure substance made up of only one type of atom.
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How is an element symbol written?
Each element has a 1 or 2 letter symbol.
The first letter of the symbol is always capitalised.
The second letter is lowercase.
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