what is a substance?

[bilalimam124]

A SUBSTANCE IS A SINGLE KIND OF MATTER THAT IS PURE-MEANING IT ALWAYS HAS A SPECIFIC COMPOSITION AND SET OF PROPERTIES. AN EXAMPLE IS TABLE SALT-NO MATTER WHERE IT COMES FROM, IT HAS THE SAME COMPOSITION AND PROPERTIES. ANOTHER EXAMPLE IS OXYGEN.

[woofgang]

and your point would be?

[wildwood]

Thank you for that information bilaliman124.

Welcome to Answerbank. The usual progress on here is that you either ask a question or answer one of the others members' questions.

btw. It is not considered polite to type in capitals on forums because it is regarded as shouting. Hope you take these comments in a positive way and have a long stay.

[NazNomad]

Belly button fluff also posseses those properties ... all we need to know now is:



Why is it always blue?

[woofgang]

you know what Naz, I hadn't thought about it bit you are right...and toe fluff is always red

[Jonathan-Joe]

If you had used "sodium chloride" as an example, what you say would make sense, though most would regard it as a trivial observation.
However, using "table salt" gives you aa problem as, according to Wikipedia (http://en.wikipedia.org/wiki/Sodium_chloride
),
"Most table salt sold for consumption today is not pure sodium chloride. In 1911, magnesium carbonate was first added to salt to make it flow more freely. In 1924 trace amounts of iodine in form of sodium iodide, potassium iodide or potassium iodate were first added, to reduce the incidence of simple goiter." So not pure and probably varying slightly in composition between different producers.
Is your idea of "substance" more useful that the the chemist's definitions of "element" and "compound".