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sulfur
sulfur (S), also spelled sulphur, nonmetallic chemical element belonging to the oxygen group…
The metal and its alloys
The metal and its alloys The world’s consumption of zinc falls into five areas. The most…
Reactions of metals with acids producing salts
Reactions of metals with acids producing salts Explore the production of hydrogen…
Indicators are dyes that change colour depending on the pH of the solution.
Indicators are dyes that change colour depending on the pH of the…