Of mixture.
of sepration

mixture of substance in which two or more substances are physically mixed together in any property tions are made up of gases such as Oxygen and nitrogen mixed together this conditions of a mixture can be separated by simple physical method

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.