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Chapter 4
Elements, Compounds, and Mixtures
Term | Definition |
---|---|
Element | a pure substance that cannot be seperated into simpler substances by chemical or physical methods |
Pure Substance | a material in which all the basic particles are the same |
Atom | the basic particle of an element |
Characteristic Properties | a physical or chemical property thats unique to a particular substance |
Metals | tend to be shiny solids; conduct heat and electric current well |
Nonmetals | dont conduct heat or electric current very well; dull |
Metalloids | have some of the properties of metals and some of the properties of nonmetals |
Compound | a pure substance composed of two or more elements that are joined by chemical bonds |
Molecule | the smallest particle of a substance that retains the chemical and is composed of two or more atoms |
Mixture | a combination of two or more substances that arent chemically combined |
Solution | is a homogeneous mixture |
Dissolving | particles of substances separate and spread evenly throughout a mixture |
Solute | substances present in a solution in smaller amounts |
Solvent | component that is present in the largest amount |
Soluble | easily dissolved |
Insoluble | incapable of being dissolved |
Alloys | solid solutions in which a metal, copper, is the solvent |
Concentration | the amount of solute in a given amount of solvent |
Solubility | how much solute dissolves in a certain amount of solvent at a certain temperature |
Dilute | the process of reducing the concentration of a solute |
Concentrated | removed the solvent and left the solute |
Suspension | mixture in which the particles of a material are large enough to settle out |
Colloid | mixture in which the particles are apread throughout but arent large enough to settle out |
Saturated Solution | one substance fully dissolved in a liquid to the point where the maximum amount of solute is reached |
Heterogeneous | not a definition yet |
Homogeneous | a solution appears to be a single substance |
Substances | matter which has a specific composition and specific properties |