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a) 2.8.7 (A chlorine atom has 17 protons and therefore 17 electrons. The first shell holds 2 electrons, and those after hold 8 electrons)
b) Chlorine exists as a diatomic molecule at room temperatur...

In “Porphyria’s Lover” Browning uses language to show how obsession can lead to the desire to possess another to the extent that ultimately, the speaker kills Porphyria. Upon deciding to murder Porphyria,...

Balancing chemical equations requires the same quantity of products as reactancts. There are two atoms of H on the left and therefore two on the left; one SO4 on the left thus one on the right; however wh...

In essay subjects such as history the way that you structure an essay is just as important as the facts that you know. Focus on understanding what the facts you know show about the society or people you a...

Oxford and Cambridge stress that the ELAT should test students' skills in analysing unseen literary material, rather than expansive literary knowledge; you cannot revise for it in the same ways y...