THE WHATIS.COM WORD-OF-THE-DAY October 14, 2002 molecule ______________ TODAY'S SPONSOR: VeriSign - The Value of Trust
Secure all your Web servers now - with a proven 5-part strategy. The FREE Server Security Guide shows you how to deploy the latest encryption and authentication techniques, deliver transparent protection with the strongest security without disrupting users, and more. Get your FREE Guide now: http://WhatIs.com/r/0,,6550,00.htm?FreeGuide ______________ TODAY'S WORD: molecule See our definition with hyperlinks at http://whatis.techtarget.com/definition/0,,sid9_gci856651,00.html A molecule is the smallest particle in a chemical compound that has the chemical properties of that compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules. Examples of such elements are oxygen and chlorine. The atoms of some elements do not easily bond with other atoms. Examples are neon and argon. Molecules can vary greatly in size and complexity. The simplest molecules consist of two atoms of the same element. However, under certain circumstances, oxygen atoms bond into triplets, forming a molecule known as ozone. Some molecules, notably certain proteins, contain hundreds or even thousands of atoms that join together in chains that can attain considerable lengths. Liquids containing such molecules sometimes behave strangely. For example, a liquid may continue to flow out of a flask from which some of it has been poured, even after the flask is returned to an upright position. Molecules are always in motion. In solids and liquids, they are packed tightly together. In a solid, the motion of the molecules can be likened to rapid vibration. In a liquid, the molecules can move freely among each other, in a sort of slithering fashion. In a gas, the density of molecules is generally less than in a liquid or solid of the same chemical compound, and they move even more freely than in a liquid. For a specific compound in a given state (solid, liquid, or gas), the speed of molecular motion increases as the absolute temperature increases. RELATED TERMS: atom http://whatis.techtarget.com/definition/0,,sid9_gci211610,00.html electron http://whatis.techtarget.com/definition/0,,sid9_gci212046,00.html liquid http://searchwebservices.techtarget.com/sDefinition/0,,sid26_gci212307,00.html solid http://whatis.techtarget.com/definition/0,,sid9_gci848662,00.html gas http://whatis.techtarget.com/definition/0,,sid9_gci852807,00.html ______________________ SELECTED LINKS: Chemical Elements.com has an interactive Periodic Table of the Elements. http://www.chemicalelements.com/ The Periodic Table of Comic Books lets you look up comic books that have referred to a given element! http://www.uky.edu/Projects/Chemcomics/ The Royal Society of Chemistry offers an unusual Periodic Table keyed to iconic images. http://www.chemsoc.org/viselements/pages/pertable_fla.htm Environmental Chemistry.com has a dictionary of terms used in chemistry. http://environmentalchemistry.com/yogi/chemistry/dictionary/index.html ______________________ THIS DAY IN IT HISTORY | October 14, 1968 Apollo 7 astronauts Walter A. Schirra, Donn R. Eisele, and Walter Cunningham, gave the first televised press conference from earth orbit during flight. http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci213291,00.html ______________________ CROSSWORD PUZZLE #4 | Graphics Improve your flexible thinking skills. Print out the puzzle and keep it nearby to work on throughout your day! http://whatis.techtarget.com/definition/0,,sid9_gci853835,00.html ______________________ QUIZ #8 | Database basics How much do you know about how a database works? Take our quiz and find out! http://searchdatabase.techtarget.com/sDefinition/0,,sid13_gci750695,00.html ______________________ REAL-LIFE CHALLENGE #17 | Why learn Linux? Bob wants to know which is the better career move -- taking the free time he has to learn Linux, or using that time to get another Microsoft certification. Can you give him some advice? http://whatis.discussions.techtarget.com/WebX?[EMAIL PROTECTED]@.1dcfae0e/141!viewtype=threadDate&skip=&expand= ______________________________ RECENT ADDITIONS AND UPDATES [1] shotgun debugging http://searchvb.techtarget.com/sDefinition/0,,sid8_gci855415,00.html [2] firehose effect http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci855934,00.html [3] connectionless http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci856314,00.html [4] zero http://whatis.techtarget.com/definition/0,,sid9_gci856016,00.html [5] TP0-TP4 http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci854617,00.html ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: LOWELL THING, Site Editor ([EMAIL PROTECTED]) ____________________________________________________________________ MARGARET ROUSE, Associate Editor ([EMAIL PROTECTED]) ___________________________________________________________________ :::::::::::::::::::: ABOUT THIS NEWSLETTER ::::::::::::::::::::: Published by TechTarget (http://www.techtarget.com) TechTarget - The Most Targeted IT Media Copyright 2002, All Rights Reserved. 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