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Number of electrons from P= 5 e , Number of electrons from 3F = 3 e , Total number of electrons around P = 8 e Therefore there is a total number of 4 electron pairs surrounding P. three of which are bond ...

Question 3 of the HAT paper is perhaps the hardest to prepare for since it typically uses obscure sources from periods you're likely to be unfamiliar with. But rather than be alarmed by this, you should r...

A reflex action occurs very quickly, and does not involve the brain. The stimulus (e.g. a flame) is sensed by the receptor (the skin). The sensory neurone attached to the receptor sends an impulse to the ...

The Cold War was characterised by two decades of antagonism predominantly between the rigidly hostile blocs, the Soviet Union and the United States. Post World War Two peace making resulted in clashing vi...

The structure of your essays in History, and other humanities subjects, during A-Level will be important in determining your grade so its appropriate to ensure your structure is logical, and coherent. You...