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In NH3, the nitrogen atom is bonded to three hydrogen atoms. By drawing the Lewis structure, the central nitrogen atom shows 3 covalent bonds to hydrogen and one lone pair. Valence Shell Electron Pair Repuls...

Vying away from the simple 'be yourself' or 'be passionate about your subject' which are both terribly vague and difficult concepts to teach, the simplest and best secret I can give to anyone applying for Ox...

Stationary points occur when dy/dx=0, therefore determine dy/dx first: dy/dx= 2x 2 + 4x - 6 2) solve dy/dx=0 for two values of x (using quadratic formula, if necessary): (x+3)(x-1)=0 --> x= 1, -3 3) to de...

Basic analysis, whilst providing the framework for a deeper investigation into your material, is less likely to be awarded highly by your examiner. Where basic analysis looks at the general themes and points...

The resting membrane potential inside the neurone (-70mV) is negative relative the outside! This means that even though there are both Na + and K + ions inside the cell, there are fewer of them (-70mV fewer)...