Why Is hydration enthalpy of lithium highest?

Lithium:

1. Lithium is a sort of metal found in grains and vegetables that is ingested in the diet. In tiny doses, many types are used in supplements.
2. Lithium receives its name from the Greek word "lithos," which means "stone," because it may be found in trace amounts in almost all rocks.

Reason for Hydration Enthalpy Of Lithium Highest:

1. The cation radius of lithium is lower. As a result, the level of hydration is at its peak.
2. Both the lithium-ion and the tiny fluoride ion have by far the largest hydration enthalpies in Groups 1 and 17, respectively. Out of all the alkali metals, lithium has the strongest polarising effects on the negative ion. Because Li+ is the smallest ion among alkali metals, the charge density for this task is significantly increased. As a result, its hydration energy increases.