A pure substance is a substance with a very low concentration of impurities: reagents for analysis, ultra pure reagents, nuclear grade materials, electronic grade materials, certified reference materials and many others.
For any class of purity exist detailed and clear standards and recommendations to avoid confusions.
Ice water is a compound.
pure substance, propanone
Pure substance
it is a pure substance.... not
Methane is a pure substance.
A pure substance is the same throughout. When a substance is 100% something it is pure.
Helium is pure as it is on the periodic table.
silicon is a pure substance because it is an element and as we know an element is a pure substance
Silicon is an element. Its symbol is Si.
pure substance
pure substance
Pure Substance