GEOL 1 Lecture Notes - Lecture 5: Continental Crust, Atomic Mass, Atomic Number
Document Summary
Element: is defined by the number of protons in its nucleus. A substance that cannot be broken down into simpler substances by ordinary chemical or physical means. Atoms: the smallest, electrically neutral piece of matter that retains the properties of an. Electrons (-): have essentially no mass, and a negative charge- they also move in directions that allow them to balance out, or neutralize their charges. Electrons charges are neutralized as the electrons crowd in around a central core of positively charged protons. Atomic number: the number of protons in an atom. Atomic mass number: the total number of neutrons and protons in an atom. Atoms: number of e in outer shell determines chemical behavior. Chemical reactions involve: loss or gain, sharing of e- Positive and negative charges: of cations (+) and anions (-) must cancel out fo elements to combine to form minerals. 30: naturally occurring, inorganic solid, chemical composition, uniform atomic structure made up of elements.
