CHEM 1103 Study Guide - Midterm Guide: Ernest Rutherford, Robert Andrews Millikan, Cathode Ray
Document Summary
The structure of the particles that compose matter determines the properties of matter. Chemistry is the science that investigates the properties of matter by examining the atoms and molecules that compose matter it. Classifying matter based on the particles that compose it (1. 2) We classify matter according to its state (which depends on the relative positions of interactions between particles) or according to its composition (which depends on the type of particles). Matter has three common states: solid, liquid, and gas. Matter can be a pure substance (one type of particle) or a mixture (more than one type of particle) A pure substance can either be an element, which cannot be chemically broken down into simper substances or a compound, which is composed of two or more elements in fixed proportions. A mixture can be either homogenous, with the same composition throughout, or heterogeneous, with different compositions in different regions. Science begins with the observation of the physical world.