Elements are classified as metals if they conduct electricity (because they allow a charge to pass through them easily). Metal oxides are basic, meaning they will neutralise acids, if metal oxides dissolve they will form a solution with pH of more that 7.
Elements are classified as non-metals if they are poor conductors of electricity. Non-metals are acidic and, if they dissolve, they will form a solution with a pH of less than 7.
A blog covering and explaining the Edexcel IGCSE Chemistry specification for the 2016 summer exams. If you are doing just double science, you do not need to learn the stuff for paper two, if you are doing triple you will need to learn all (GOOD LUCK!) I have separated the papers to make files easier to find. Hope it helps :)
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