Which alkene is the most reactive in the heck reaction?

The answer is 4 i don't know if its right let me see.

Ok so co(g) is not pronoused that. the only clue is that youpronouse it the oppisote way. 

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.