chem trends

chem trends - Some exam 'Dos and Don'ts": Periodicity...

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Some exam 'Dos and Don'ts": Periodicity Advice on answering questions on topics often highlighted by examiners as being poorly answered in the past. Make sure that the detail covered by the question is included in your syllabus specification. Trends across the Periodic Table Statement of the the trends in properties of elements across a period or down a group or comparing two elements, and their explanation, are favourite exam questions which are generally not well answered. Answers often merely state the trend, without explaining the reasons for it. If asked to compare two atoms or ions, both should be mentioned in the answer. Almost all the properties that are asked about in exam questions rely on the attraction between the outer electrons of an atom and the nucleus. Your answer to questions on trends or differences should always include a statement about how this attraction is affected. First remember that:
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chem trends - Some exam 'Dos and Don'ts": Periodicity...

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