Which sequence correctly ranks elements from smallest to largest atomic radius?

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.

H2so4 is the chemical compound of sulfuric acid. 

Answernon electrolyte;