Which substance can be broken down by chemical means?
1) magnesium
2) manganese
3) mercury
4) methanol

Its methanol because the rest are all elements

Ineed with this also i hope you understand it

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.