Identify the correct statement from the following.
(1) Lithium chloride is deliquescent and crystallises as a hydrate, LiCI·H2O.
(2) The order of hydration enthalpies of alkaline earth cations
Be2+ < Mg2+ < Ca2+ < Sr2+ < Ba2+
(3) Lithium and Magnesium show some similarities in their physical properties as they are diagonally placed in periodic table.
(4) Lithium is softer among all alkali metals.