Page 5 - Pro test

Atomic Structure

• All matter is made of different combinations of atoms.

• Atoms are the smallest unit of matter, nothing can be made of something

smaller than atoms.

• Atoms are made up of sub-atomic particles (electrons, protons and

neutrons) and all follow the same structure shown in the diagram.

Electron

Proton

Neutron

• One type of atom is called an element, the element shown

in the diagram above is hydrogen (the smallest atom).

• There are over a hundred known elements; they have

different properties due to the different numbers of sub-

atomic particles.

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