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An action potential from the axon arrives at the presynaptic neuron, stimulating voltage-gated calcium (Ca2+) ion channels to open. This allows calcium ions to diffuse into the synaptic knob, c...
Answer: water, followed by hydrogen fluroide, ammonia and lowest is methane.
Explanation: First it helps to write the molecular formulae of these molecules and know their shape:
One of the biggest jumps between GCSE and A Level is the volume of reading that you have to do. Of Mice and Men becomes Jane Eyre; Tess of the D'Urbervilles; Birdsong, or the Handmaid's Ta...
A good place to start is making things simple.
For paragraphs, this means understanding clearly what is expected. Once you know that, then you can focus on getting your b...
This is one of the most difficult questions in the exam, because it requires both linguistic knowledge and a literary appreciation of the text. In question 2a of Section B in the current format of A2 Lati...
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