Dot and cross diagrams help us to model when ions are formed from atoms. Here’s an example using sodium and chlorine. They form ions which bond to form sodium chloride. 2. Work out how many ...

The questions in this quiz are suitable for GCSE physics students studying structure of the atom, atoms and isotopes and ions. If you struggled with the quiz, don't panic - we've got you!

Ion channels are integral membrane protein assemblies that modulate the flow of ions into and out of a cell or organelle, leading to generation of electrical signals. Opening (gating) of ion ...