Suppose That a Particular Chemical Substance Is "Pure" [Contains No

Multiple Choice

Suppose that a particular chemical substance is "pure" [contains no "impurities"], and that it is not possible to decompose this substance by chemical means. What can we conclude from this?

A) The substance must be a chemical compound.
B) The substance must be an element.
C) The substance must be one of the ideal, or perfect, gases.
D) The substance must be incapable of entering into chemical reactions of any kind.
E) None of the above.