Because attraction of water molecules around an ion depends on. that ion's density of charge, smaller ions (and thus ions of greater ionic. potenti. al) attract more water molecules. The result is the. inverse. relationship. between non-hydrated radius and hydrated radius shown below.
[v. 5] In Hebron he reigned over Judah seven years and six months: and in Jerusalem he reigned thirty and three years over all Israel and Judah.   This would have made David 37 when he became king of all Israel. Do not get confused between 'Judah' and 'Israel': they are not the same.
The son of Abiathar came in and said, King David has made Solomon King.. Then all of Adonijah's guests were afraid and went home quickly, not long after that David died, after being king for forty Years. Then Solomon went to Gibeon to offer sacrifices to God.