CHE 106 Lecture Notes - Lecture 2: Hydrogen Bond, Hexafluoride, Chemical Change
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CHE 106 Full Course Notes
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Document Summary
Matter: material that occupies mass and volume. Element: substance containing atoms of same atomic number. Atoms: smallest representative building block of matter. Molecules: two or more atoms bonded within a specific geometry. Properties: the characteristics that give matter a unique identity (color, density, specific heat, malleability, conductivity, melting/boiling point) Macroscopic scale: observed with the are eye (boulder, human hair) Microscopic scale: observed with an optical microscope (red blood cell, dust particle) Atomic scale: cannot be observed with an optical microscope (ammonia molecule, iron. Closely packed molecules, rigid, and in an ordered structure. Liquid: shape conforms container, fixed volume, hard to compress. Closely packed, still move over each other quickly, disordered. To go to gas increase temp & decrease pressure. Gas: shape conforms to container, fills container completely, volume can change. Molecules are farr, quickly colliding, empty space. To go to liquid: decrease tem & increase pressure.
