Class Notes chapter 1
Class Notes chapter 1 CH 101
Popular in General Chemistry
Popular in Chemistry
verified elite notetaker
This 3 page Class Notes was uploaded by Allie Newman on Monday August 31, 2015. The Class Notes belongs to CH 101 at University of Alabama - Tuscaloosa taught by Professor John McDuffie in Fall 2015. Since its upload, it has received 12 views. For similar materials see General Chemistry in Chemistry at University of Alabama - Tuscaloosa.
Reviews for Class Notes chapter 1
Report this Material
What is Karma?
Karma is the currency of StudySoup.
Date Created: 08/31/15
CH 101 Class Notes 82115 Matter Matter is composed of particles Example atoms molecules and subatomic particles such as neutrons protons and electrons How the particles come together dictates the physical properties of matter Matter is de ned as anything that has mass and occupies space has volume Chemistry is the discipline that seeks to understand matter and its properties Elements Molecules and Mixtures l The Types of Matter Atoms Basic submicroscopic particles that constitute the fundamental building blocks of ordinary matter Molecules Substances formed when two or more atoms come together bond in speci c geometric arrangements Atoms and molecules determine how matter behaves The Classi cation of Matter Matter can be classi ed according to It s state its physical form ie solid liquid or gas based on what properties it exhibits It s composition or the types of particles The state of matter changes from solid to liquid to gas with increasing temperature Solid Matter ln solid matter atoms or molecules pack close to each other in xed locations Although the atoms and molecules in a solid vibrate they do not move around or past each other Consequently a solid has a xed volume and rigid shape Ice aluminum and diamond are good examples of solids Liquid Matter ln liquid matter atoms or molecules pack about as closely as they do in solid matter but they are free to move relative to each other Liquids have xed volume but not a xed shape Liquids ability to ow makes them assume the shape of their container Water alcohol and gasoline are all substances that are liquids at room temperature Gaseous Matter ln gaseous matter atoms or molecules have a lot of space between them They are free to move relative to one another These qualities make gases compressible Classi cation of Matter by Components Matter can be classi ed according to its composition elements compounds and mixtures 35 One type of pattlcle g r m i Separable into simpler substances llelium Particles lllu39ater Particles Wet sand Two types of Tea with sugar Two types of are atoms are molecules particles that separate particles that thoroughly mix into distinct regions The rst division in the classi cation of matter is between a pure substance and a mixture A pure substance is made up of only one component and its composition is invariant A mixture by contrast is a substance composed of two or more components in proportions that can vary from one sample to another Pure substances can be categorized into two types Elements Compounds This categorization depends on whether or not they can be broken down or decomposed into simpler substances An element is a substance that cannot be chemically broken down into simpler substances Basic building blocks of matter Composed of single type of atom like helium A compound is a substance composed of two or more elements in xed de nite proportions Most elements are chemically reactive and combine with other elements to form compounds such as water or sugar Mixtures can be categorized into two types Heterogeneous mixtures Homodeneous mixtures This categorization of mixtures depends on how uniformy the substances within them mix A heterogeneous mixture is one in which the composition varies from one region of the mixture to another Made of multiple substances whose presence can be seen example a salt and sand mixture Portions of a sample of heterogeneous mixture have different composition and properties A homogeneous mixture is one made of multiple substances but it appears to be one substance All portions of a sample have the same composition and properties like sweetened tea Homogeneous mixtures have uniform compositions because the atoms or molecules that compose them mix uniformly