We request time on VESUVIO to measure group-I metal hydrides NaH, KH, RbH, and CsH. These metal hydrides will be measured to fit the proton and metal recoil peaks extracted from Neutron Compton Scattering data by means of Gram-Chralier (GC) expansions. The standard deviations of the proton momentum distribution will be fitted in addition to higher moments such as the excess kurtosis of the proton and metal momentum distributions. Moreover, the magnitude of final-state effects (FSE) k will be fitted as a function of the magnitude of the momentum transfer for protons and metal nuclei. These NCS observables will be correlated to systematic changes in electronegativity, ionic radii, lattice energy, mean bond enthalpy, and standard enthalpy of formation. Ab initio predictions of these Compton observables by means of plane wave DFT (PW-DFT) will be calculated using the package CASTEP.