Molecularity#!#Elementary and Complex reactions

Introduction||Rate OF Reaction and Measurement OF Rate OF Reaction||Differential Rate Law|| Rate OF Appearance and Disappearance||Rate in terms OF Pressure||illustrations on Rate Calculation||Rate law,Elementary and Complex Reactions||Order and Molecularity

Rate OF Reaction in terms OF Pressure||Elementary and Complex Reactions|| Order and Molecularity||Determination OF Order by RDS Method

Rate OF Gaseous Reactions in Terms OF Pressure || Rate Law for a Reaction || Elementary And Complex Reactions || Order & Molecularity || Relation Between Different Rate Constants

Why molecularity is applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?