The hydration enthalpies of alkali metal ions decrease down the group from `Li^(+)" to "Cs^(+)` -Why?

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement -1: Solubilities of alkali metal fluorides and carbonates increase down the group. Statement - II : Hydration energies of alkali metal halides decrease down the group with increase in size of cations.

Density of alkali metals are very low - why ?

The basicity of the alkali metal hydroxides ____________ down the group.

Which of the following property decreases down a group :

Explain why the ionic character of the hydrides of alkali metals increases down the group.

The mobilities of alkali metal ions in aqueous solution increases in the order: Li^(+) lt Na^(+) lt K^(+) lt Rb^(+) . Explain.

why are alkali metals stored in kerosene ?

Why does the basic strength of alkali metal hydroxides increase on moving down the group?

Explain why the second ionisation enthalpies of alkali metals are very high.