Edexcel OLevel Chemistry revision notes

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Lesson

Lesson-8.1.1- know the approximate percentages by volume of the four most abundant gases in dry air.

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Lesson-7.1.4- explain the trend in reactivity in Group 7 in terms of electronic configurations.Previous Lesson-8.1.2- understand how to determine the percentage by volume of oxygen in air using experiments involving the reactions of metals (e.g. iron) and non-metals (e.g. phosphorus) with air.Next