I don't know how to put only Shear Modulus in rock properties. Instead, I have used Young's modulus and Poisson's ratio(Is it okay to use that ). In the case of Material parameters of air, I don't know Where or how to assign the Adiabatic exponent. May anyone guide me to where I can get that? I am attaching the screenshot of the property of the material(which I referred to from a paper), and I have marked the specific ones.

Abaqus ​​​​​​​