Will a rubber stopper sink or float

-- If the density of the rubber stopper is less than the density of the fluid
into which it is dropped, then it will float.

-- If the density of the rubber stopper is greater than the density of the fluid
into which it is dropped, then it will sink.

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.