atom the smallest unit of an element thatmaintains the properties of that element
ElementA substance that cannot be separated by ordinary chemicalor physical means. Elements are composed of only onekind of atom.Examples: Iron (Fe), copper (Cu), and oxygen (O2).
CompoundA substance that contains two or more elements, in definiteproportion. Water is 11.2% Hydrogen and 88.8% OxygenExamples: Table salt (sodium chloride, NaCl), sugar (sucrose,C12H22O11), and water (H2O).
Pure Substance A substance with constant composition. Can be classified an either an element or as a compound. Examples: Table salt (sodium chloride, NaCl), sugar (sucrose, C12H22O11), water (H2O), iron (Fe), copper (Cu), and oxygen (O2).
Matter and Its Propertiesextensive property a property that dependson the amount of matter that is presentVolume, Mass, Amount of Energy it Contains
intensive property a property that does notdepend on the amount of matter present •Color •Odor •Luster •Malleability •Ductility •Conductivity •Hardness •Melting/Freezing Point •Boiling Point •Density
Matter and Its Propertiesphysical property a characteristic that can beobserved or measured without changing the identity ofthe substance melting point electrical conductivity color density boiling point thermal conductivity odor hardness
Matter and Its Propertiesphysical change a change in a substance that doesnot involve a change in the identity of the substanceEx. Melting, tearing, boiling, freezingWhen you step on a can and crush it, you have forced aphysical change. The shape of the object has changed. Itwasnt a change in the state of matter, but somethingchanged. When you melt an ice cube you have also forced aphysical change (adding energy).
Matter and Its Propertieschange of state a physical change of asubstance from one state to another
Matter and Its Propertiessolid the state of matter in which the substancehas definite volume and definite shape
Matter and Its Propertiesliquid the state of matter in which the substancehas a definite volume but an indefinite shape
Matter and Its Propertiesgas the state of matter in which a substance hasneither definite volume nor definite shape
Matter and Its Propertiesplasma a high-temperature physical state ofmatter in which atoms lose their electrons
chemical property the ability of a substanceto undergo a change that transforms it into adifferent substance
chemical change a change in which one or moresubstances are converted into differentsubstances (a chemical reaction) Reactants: substance that react Products: substance that are produced Sodium Na: Metal, Explodes in Water Chlorine Cl: Green, Poisonous Gas Sodium Chloride NaCl: Table Salt
Reactants: substance that reactProducts: substance that are produced
MixtureTwo or more substances, combined, each retaining its ownproperties. Can be separated without the making or breakingof chemical bonds.Examples: Air, salt dissolved in water, milk, wood, andconcrete.
Homogeneous MixtureMixture in which the properties and composition areuniform throughout the sample. Such mixtures are termedsolutions.Examples: Air and table salt thoroughly dissolved in water.
Heterogeneous MixtureMixture in which the properties and compositionare not uniform throughout the sample.Examples: Milk, wood, and concrete.
Strategies for SuccessThe Will to Succeed is Important But What is MoreImportant in the Will to Prepare…Bobby KnightExpected to be Called on During the Class PeriodRead the Assigned PagesTake Organized NotesCopy Notes Onto 3x5 CardsUse the Computer Based Tools (Homework, Practice Quizzes,Reading Assignments)Communicate With Your TeacherAsk Questions During Class(Your Teacher Appreciates the Opportunity to Explain Concepts inMore Detail)Master All Calculations or Ask QuestionsGet Extra Help Before School, After School, or During a Free Period