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.
Hudson Valley Community College. Hudson Valley Community College, a SUNY associated two-year college, is located in Troy in Rensselaer County, New York. Although about eighty percent of the students are from the local area, the remainder are from other parts of New York, other states and from some 30 countries around the world.