Even in solids there is a small space between the atoms. Depending on how tight the atoms are packed determines the density of matter. This means that a one inch block of wood is not as dense as a one inch block of gold. There is more space between the atoms of the wood than the atoms of the gold.
The total area of Kentucky is 40,409 sq mi (104,659 sq km), of which land makes up 39,669 sq mi (102,743 sq km) and inland water 740 sq mi (1,917 sq km). Kentucky extends about 350 mi (563 km) E-W; its maximum N-S extension is about 175 mi (282 km).
The median age of people in Louisville/Jefferson County, KY-IN Metro Area in 2015 was 38.9, and native-born citizens (39.1) are generally older than foreign-born citizens (37.2). Compared to 2014, where the average age was 38.4, the residents of Louisville/Jefferson County, KY-IN Metro Area are getting older.