Solution:
The electrical conductance of an atom chiefly relies upon its covalent or ionic nature. CaH2 is an ionic hydride, which conducts power in the liquid state. Titanium hydride, TiH2 is metallic in nature and behaviors power at room temperature. Covalent mixtures don’t direct, while Ionic mixtures lead. BeH2 is a covalent hydride. Thus, it doesn’t lead.
Thus, the expanding request of electrical conductance is as per the following:
BeH2 < CaH2 < TiH2