CLASSIFYING MATTER Classifying Matter Concept Map Matter Pure

Classifying Matter Concept Map Matter Pure Substances Elements Mixtures Separated Physically Into Pure substances

Pure Substances Substance that contains only one type of atom (elements) or molecules (diatomic

Elements One kind of atom only Cannot be broken down into simpler substances by

Compounds… 2 or more kinds of atoms Can be broken down into simpler substances

Mixtures Combination of 2 or more pure substances in which each pure substance retains

1. Homogenous Mixtures Mixture in which the composition is uniform; constant composition throughout –

2. Heterogeneous Mixture A mixture in which the composition is not uniform throughout; does

Compounds VS Mixtures Compounds Mixtures • Composed of 1 type of particle (Has 2

Think, Pair, Share: Element, Compound, or Mixture? 1. ______ 2. ______ 3. ______ 4.

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CLASSIFYING MATTER

Classifying Matter Concept Map Matter Pure Substances Elements Mixtures Separated Physically Into Pure substances Compounds Separated Chemically Into Mixtures Heterogeneo us Homogeneou s

Pure Substances Substance that contains only one type of atom (elements) or molecules (diatomic elements and compounds) � Examples: Copper Elements and Compounds Water Gold

Elements One kind of atom only Cannot be broken down into simpler substances by chemical changes Can be monatomic or diatomic

Compounds… 2 or more kinds of atoms Can be broken down into simpler substances by chemical changes Properties of compound are different from component elements � Example: + Na (sodium): Cl 2 (chlorine): Na. Cl (Table Salt)

Mixtures Combination of 2 or more pure substances in which each pure substance retains its individual chemical properties Physical blend � May be separated into pure substances by physical methods � No chemical reactions are needed to separate mixtures; substances are NOT bonded �

1. Homogenous Mixtures Mixture in which the composition is uniform; constant composition throughout – always has a single phase �Also called solutions �Ex. Air, Kool-Aid

2. Heterogeneous Mixture A mixture in which the composition is not uniform throughout; does not blend smoothly and in which the individual substances remain distinct

Compounds VS Mixtures Compounds Mixtures • Composed of 1 type of particle (Has 2 or more types of atoms) • Components chemically bonded • Components combine in fixed proportion/ratio • Properties are different than those of component elements • Have distinct MP and BP • Composed of more than 1 type of particle • Components NOT chemically bonded • Components can be mixed in any proportion • Properties of each component remain the same • Does not have distinct MP and BP

Is this a pure substance or mixture?

Classifying Matter Summary

Think, Pair, Share: Element, Compound, or Mixture? 1. ______ 2. ______ 3. ______ 4. ______ 5. ______