An organic chemist plans for the synthesis of a complex organic molecule by

In order to synthesize a complex organic molecule, the chemist should at least illustrate or imagine the bonds that are in need to be cut down or to separate in order to obtain the compound that can be easily changed.

the awnser is group 12

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.