Question

make a list of 20 pure substances​

Answer 1

Examples of pure substance :-

       

tin

sulfur

diamond

water

pure sugar

Gold

Baking soda

coal

rubies

carbon

 Iron  

Copper  

Silver  

Hydrogen  

Oxygen  

Magnesium  

Mercury  

Sodium  

Potassium

Crystals, in general, are pure substances.

Pure substances which are crystals include

salt

diamond

protein crystals

copper sulfate crystals

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