3- Which process use to convert heavier hydrocarbons into lighter ( gasoline ) in the absence of oxygen and in the presence of catalyst ?

A- Fractional distillation

B- Melting

C- Cracking

D- Boiling

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.

The correct answer is weight.