CIVI 231 Lecture Notes - Lecture 2: Talc, Relative Atomic Mass, Cuboctahedron
19 Sep 2016
School
Department
Course
Professor
Document Summary
Chapter 2: minerals: the building blocks of rocks. Ice only contains the molecules of h2o, it is solid, there is a chemical composition. 118 known elements (90 of which are naturally occurring) Elements are the basic building blocks of minerals. Consists of protons (+) and neutrons (no charge) Approx total number of protons and neutrons in the nucleus. One atoms give up electrons, and another receives them. These now oppositely charged atoms attract each other, and become electrically neutral. Consists of an ordered array of atoms chemically bonded to form a particular crystalline structure. Some elements can join in more than one geometric arrangement. Example: diamond (deeply buried, high pressured) & graphite (shallowly buried, low pressure) External expression of the orderly internal arrangement of atoms. Crystal growth is often interrupted because of competition for space and rapid loss of heat. Other terms, such as vitreous, silky, or earthy, are used to frther describe non-metallic lustre.
