Which of the following is an example of a heterogeneous equilibrium reaction? O a) MgO(s) + CO2(g) = MgCO3(s) O b) C2H2(g) + 2Br2(g) = C2H2Br4(8) O c) N2(g) + 3H2(g) = 2NH3(8) O d) N204(8) =2NO2(8) O e) H2(g) + F2(8)=2HF(3)

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.