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Ionic bonds exist between metals and non metals for example sodium and chlorine. Metals have one to three electrons in their outer shell which can be transferred to a non metal. This means that the metal now...

Saltatory conduction refers to the passage of an action potential along a myelinated neurone. Myelin is a lipid that forms a fatty sheath around the neurone axon and it is an electrical insulator. This means...

Textbooks and a few core texts recommended by your teacher will often suffice, however reading a few good overviews of the period will help you to better understand it and provide examples or explanations no...

In the A-level Latin verse paper, you will have to write elongated answers analysing the style, form and content of passages of seen Latin poetry. This advanced level of literary analysis can be daunting at ...

Fertilisers are generally high in nitrogen, to replenish the nitrogen in the soil assimilated by the crop plants. When this is drained into lakes in run-off, it can cause dramatic consequences. Nitrogen avai...