GEOL105 Lecture Notes - Lecture 1: Continental Crust, Oceanic Crust, San Andreas Fault
6 Sep 2016
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September 3, 2015- earth materials- elements, minerals, and rocks. Water also important (play a role in a lot of geological processes) Atoms (smallest unit an element can have) are the smallest units of elements (92 natural) The major subatomic particles that control chemical characteristics are protons, neutrons, and electrons. Protons: in nucleus, positive charge: atoms of each elements have a unique number of protons (atomic number)- if you take one away you have a different element. Electrons: nearly mass-less, negative charge: atoms can be bond together through electron behavior. Neutrons: in nucleus, no charge- same mass as protons: number of neutrons can change for each element atomic weight changes. Some are stable, others decay and are radioactive: radioactive decay creates heat in the earth, used in determining age of rocks. Most elements on earth in compounds and mixtures: T a n i s | 2: compounds: atoms bound together in molecules, unique properties.
