CHEM 101 Study Guide - Binary Phase, Chemical Equation, Subatomic Particle
19 Sep 2013
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Document Summary
Chemistry: the study of matter, transformations, and energy changes. Macroscopic: matter that make up the world and can be seen with the eye. Molecules: groups of atoms joined in a definite way forces are covalent bonds: symbolically represented by molecular formulas, gives symbol of each atom in the molecule (space-filling and ball and stick) Compound: made of 2+ elements combined in a definite way. Element: substance made of 1 atom that combine to give molecules. Solids held together by attractive forces between them vibrate in fixed positions (low kinetic energy) Liquids held together by looser alternative forces more freer kinetic energy compared with attraction forces. Physical properties are characteristic of given substance and can be observed/measured without changing chemical identity (e. g. conductivity, reflectivity, density, melting/boiling temperature) Physical change takes place without altering chemical identity. Chemical change: conversion of substances (reactants) to new substance(s) (products) take place.
