A compound is a chemical substance that forms when two or more different elements combine in a fixed ratio. Water (H2O), for example, is a compound that is made up of two hydrogen atoms for every one oxygen atom. Sodium chloride (NaCl) is a compound made up of one sodium atom for every chlorine atom.
Hudson, Iowa. Hudson is a city in Black Hawk County, Iowa, United States. The population was 2,282 at the 2010 census. The rural community of Hudson has grown in recent years and is included as a part of the Waterloo-Cedar Falls Metropolitan Statistical Area. Contents.
The City of Hudson had a population of 13,612 as of July 1, 2017. Hudson ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Wisconsin. See peer rankings below. The primary coordinate point for Hudson is located at latitude 44.9693 and longitude -92.7279 in St. Croix County.