# Chemistry - Comparing ionic character of group 1 elements

Well, the second source is certainly more wrong. There is a major difference between ionic character of a bond and the stability (lattice energy) of an ionic lattice. $$\ce{LiH}$$ is certainly more covalent than $$\ce{CsH}$$ (meaning $$\ce{CsH}$$ is more ionic), which can be justified simply by comparing charge densities on $$\ce{Li}$$, which is very high and draws electron density from the $$\ce{H}$$ atom, forming a more covalent bond.