CAS GE 100 Lecture Notes - Lecture 2: Uranium-235, Uranium-238, Rhine
15 Mar 2016
School
Department
Course
Professor
Document Summary
Chapter 2 the laws of matter and energy. Elements- cannot be broken down by chemical means, 92 naturally occurring, Compounds- two or more elements that are combined together. 25 essential elements for life, carbon makes up of the dry weight of organisms, carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur are macronutrients. Toxic metals include lead, cadmium, aluminum, copper and zinc. 10 elements make up more than 99% of earth"s crust. Material resources include copper, iron, uranium, nickel, phosphorus, sulfur, and silicon energy resources include hydrocarbons (h and c) such as coal, oil, and natural gas. Atoms- are units of matter, the smallest units having physical and chemical properties of its element subatomic particles - protons, neutrons, electrons. Molecule - an assembly of two or more tightly bound atoms. Isotopes - are important for nuclear power and nuclear energy, uranium 235 ( fewer neutrons- lighter and less stable) is nuclear reactive, whereas uranium.
