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 biblical King David of Israel was known for his diverse skills as both a warrior and a writer of psalms. In his 40 years as ruler, between approximately 1010 and 970 B.C.E., he united the people of Israel, led them to victory in battle, conquered land and paved the way for his son, Solomon, to build the Holy Temple.