The present work focuses on theoretical calculations of Rayleigh scattering cross sections for elements in range 1 ≤ Z ≤ 92. It is decided to calculate the theoretical Rayleigh scattering cross sections using Form Factor approach and state of the art S-Matrix approach at incident photon energies in X-ray energy region. It is also decided to develop a proper method to calculate the theoretical values at incident energies near the subshell binding energies. In the experimental measurements various radioisotopes like 55Fe, 109Cd, 241Am are used as the source of x-ray photons by researchers mostly. Some also employed the X-ray tube setups with secondary excitation mode. In the present work, a sincere review has been done for the theoretically and experimentally evaluated values of Rayleigh scattering cross sections. The theoretical values for some of the references are reproduced using the same approaches and the issues regarding some deviations observed are addressed.