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.
Rockland County, New York. Rockland County is the southernmost county on the west side of the Hudson River in the U.S. state of New York, part of the New YorkâNewarkâJersey City, NYâNJâPA Metropolitan Statistical Area.