What occurs when two metals have a high lattice enthalpy?

When two metals have a high lattice enthalpy, it indicates that a significant amount of energy is released when the ions come together to form a solid ionic compound. This high lattice enthalpy typically results from strong electrostatic interactions between the positively charged cations and negatively charged anions in the lattice structure. Consequently, these strong interactions contribute to the overall stability of the solid.

A high lattice enthalpy suggests that the compound formed will be more stable and less likely to dissociate into its constituent ions compared to compounds with lower lattice enthalpy. Such stability is characterized by a high melting point, low solubility in solvents like water, and strong ionic bonding. In the context of the choices provided, the option indicating high stability directly relates to how these strong lattices resist breaking apart, making the compound reliably stable in its solid form.