Structure of an atom

• Atoms are the smallst particles of an element that can take part in chemical reactions
• They are too small to see directly
• However from the results of many experiments to understand their structure, scientists have concluded that each atom contains an even smlled object at its centre - nucleus

Subatomic particles

• Atoms are made from three types of subatomic particle
• The nucleus contains protons and neutrons. It is surrounded by electrons
• The electrons are…