Chemical substance

furm o matter that haes constant chemical composeetion an characteristic properties
(Reguidit frae Chemical)

In chemistry, a chemical substance is a furm o matter that haes constant chemical composeetion an characteristic properties.[1] It cannae be separatit intae components bi pheesical separation methods, i.e. wioot breakin chemical bonds. It can be solid, liquid, gas, or plasma.

Steam an liquid watter are twa furms o the same chemical substance, H2O.

References

eedit
  1. IUPAC, Compendium o Chemical Terminology, 2nt ed. (the "Gold Book") (1997). Online corrected version:  (2006–) "Chemical Substance".