CHEM 001 Lecture Notes - Lecture 3: Nonmetal, Atomic Number, Tellurium
14 Sep 2019
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Document Summary
Element: a fundamental substance with very specific physical and chemical properties. Cannot be broken down into simpler substances by simple chemical or physical means. Each element has an atomic number which defines it. Atom: the smallest particle of an element that exhibits the characteristic properties of the element. Stands for: the element itself & one atom of the element. Symbols either have one or two letters. If two are used, only the first is capitalized. Nonmetals are found to the right of the metalloids. Can be either crystalline or amorphous depending on the internal arrangement of the particles that constitute the solid. Particles are close -- not as close as in solids. Solid particles -- have strong intermolecular attractive forcesbetween them (ex. Liquid particles -- have intermediate intermolecular attractive forcesbetween them (ex. Gas particles -- have extremely weak intermolecular attractive forcesbetween them (ex. Physical properties: inherent characteristics of a substance that are determined without changing its composition.
