Isothermal compressibility and magnetic susceptibility are thermodynamic properties (response functions) that characterize the behavior of materials subjected to changes in pressure and magnetic field. These thermodynamic properties can be expressed in terms of Landau parameters. The Landau parameters depend on the interaction between the particles in the system and can be calculated from Fermi liquid theory. The first term in this series, F_0^(s,a), is the most important for describing the thermodynamic properties of fermionic systems at low temperatures and moderate densities. However, for denser systems or at higher temperatures, the higher order terms, F_1^(s,a), and F_2^(s,a), can have a significant influence on the behavior of the system and modify predictions based on F_0^(s,a) alone. The results of the theoretical model were used to determine the thermodynamic properties of sodium (Na), potassium (K) and lithium (Li) and compare with experimental results reported by other authors. It was shown that the isothermal compressibility of sodium (Na) is 1.45 and potassium (K) is 1.08, while the magnetic susceptibility of sodium (Na) is 1.58 and potassium (K) is 1.83. and of lithium (Li) is 3.33.