CHEM 135 Chapter 1.1-1.2: CHEM 135 Chapter 1.1-1.2
12 Aug 2016
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1. 1- a particulate view of the world structure: Defined as anything that occupies space and has mass. Properties of the matter is determined by the structure: atoms. Form molecules when in specific geometric arrangements. 2 hydrogen and 1 oxygen atom yields 1. 1. 2- classifying matter: a particulate view: substance: classifications. Dependent on relative particle position and the strength of interaction between particles. Strength of interaction is relative to temperature (sold liquid gas as temperature increases) Solid: strongly attracted particles, particles pack in fixed locations, particles vibrate but do not move past one another, fixed volume, rigid shape, ex. ) Liquid: weaker particle attraction, particles pack about as closely as solid matter, particles are able to move past one another, fixed volume, assumes shape of the container, ex. ) Gas: very weak particle attraction, particles do not clump together, free movement until particles collide with each other, assume the shape and volume of the container, compressible (due to large space between particles, ex. )
