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There is no such thing as a foolproof way of determining the gender of a noun. However, there are a few rules which are worth learning and which will help you in this way, especially if you are a list lea...

• Fluorine is a halogen, these group 7 elements are reactive because they require just 1 additional electron to achieve a noble configuration. 

• Fluorine is the smallest halogen, ...

differentiating e^x gives e^x (need to know this), differentiating -5x gives -5 (step the power of the x down by 1 and multiply the original power with the coefficient, power of the x ...

The most importance driving factor in your answer should be your argument, At the beginning of the essay, make it clear to the marker exactly what you think about the issue in the question. For example, i...

A stimulus at the receptor end of the neuron causes the membrane to become more permeable to Na+ ions. Because there is a higher concentration of Na+ on the outside of the cell the flood into the cell dow...