For the simple decomposition reaction AB(g)  A(g) + B(g) rate = k [AB]2 and k = 0.2 L/(mols). How long will it take for [AB] to reach 1/3 of its initial concentration of 1.50 M?

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.