The Young's modulus of metals varies with the temperature and can be realized through the change in the interatomic bonding of the atoms, and hence its change is found to be dependent on the change in the work function of the metal. Although classically, this change is predicted through fitting and without a clear underlying mechanism (for example, the Watchman's formula), the Rahemi-Li model demonstrates how the change in the electron work function leads to change in the Young's modulus of metals and predicts this variation with calculable parameters, using the generalization of the Lennard-Jones potential to solids. In general, as the temperature increases, the Young's modulus decreases via E ( T ) = β β ( φ φ ( T ) ) 6 where the electron work function varies with the temperature as φ φ ( T ) = φ φ 0 − − γ γ ( k B T ) 2 φ φ 0 and γ γ is a calculable material property which is dependent on the crystal structure (for example, BCC, FCC). φ φ 0 is the electron work function at T=0 and β β is constant throughout the change.