Publishing as Benjamin Cummings. 3. A pure substance is classified as. â¢ matter with a specific and constant composition. â¢ an element when composed of one type of atom. â¢ a compound when composed of two or more. elements combined in a definite ratio. Pure Substances.
Hudson is a city in Lenawee County in the U.S. state of Michigan. The population was 2,307 at the 2010 census.
Croton-on-Hudson is a village in Westchester County, New York, United States. The population was 8,070 at the 2010 census. It is located in the town of Cortlandt, in New York City 's northern suburbs.