Atoms, isotopes and ions - AQA Atoms are made ... Sample exam questions - atomic structure - AQA Understanding how to approach exam questions helps to boost exam performance.

This clip shows how carbon is made up from sub-atomic particles. Electron shells are mentioned. Two extra neutrons are added to make an unstable isotope which explodes at the end. This clip could ...

Heavy water is a form of water with a unique atomic structure and properties coveted ... with a neutron as well as a proton in its nucleus. This isotope of hydrogen is called deuterium, and ...