At which location do the convection currents cause the plates to diverge?

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.

Putting salt in vinegar water

Pretty sure it's d. heterogeneous is separated by physical properties. 

They adding another layer their bahaviors.