Yes, in chemistry a pure substance means either an element or a compound. Thus, hydrogen, oxygen, sodium, iron, copper etc. are pure substances; and so are compounds such as water, sugar, ammonia, sodium chloride, methane, ethanol etc. A compound is composed of two or more elements combined in a fixed ratio by mass. Like an element, a compound also has a distinct chemical identity. A mixture is not a pure substance as it is a collection of two or more elements/compounds in varying ratio. Air, sea water, gasoline, vegetable oils, steel etc. are mixtures.
Hudson (CDP), Massachusetts. Hudson is a census-designated place (CDP) in the town of Hudson in Middlesex County, Massachusetts, United States. The population was 14,907 at the 2010 census.
Ashburn Municipal Court. Hudson college bang here attracts several people and the college crowd to holiday here. People who join their friends or family in this city head to the mountains to holiday. Also the city has historic prominence with historic court house, and shingler heights. Other Courts in Turner County: Ashburn Magistrate Court; Ashburn Superior Court; Sycamore Municipal Court.