ERSC 2P21 Lecture Notes - Lecture 6: Valence Electron, Ionic Compound, Ionic Radius
19 Dec 2018
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Document Summary
Chemistry of the bonding dictates: strength of the bonds, geometry of the crystal structure. Giving rise to an observable mineral crystal structure and physical properties such as strength, melting point, conductivity, density, etc. Which leads into chemistry: in mineralogy, we are most interested in: outermost electrons (valence, chemical bonding, ionic radius. Atomic number (z): the number of protons in an atom. Atomic mass: true mass in amu (atomic mass units) 1/12 12c atom. Arranged with vertical groups of elements (roman numerals) that have equal numbers of electrons in the outermost shell. Charged particles characterized by their loss or gain of electrons. Some elements may be found with one or more oxidation state (valence state) This ability to switch between valence states allows for redox reactions in inorganic and organic settings. Atomic radius: the radius of the maximum radial charge density of the outermost shell of the atom. But the effective radius depends on neighboring atoms.
