Elements, Compounds,

and Mixtures

Elements, Compounds,

and Mixtures

MATTERMATTERMatter can be split into three different groups: ElementsCompoundsMixtures

Matter can be split into three different groups: ElementsCompoundsMixtures

Matter is : Matter is :

Anything that has MASS and VOLUME Anything that has MASS and VOLUME

ELEMENTELEMENTDefinition: A pure substance that is

made of only a single type of atom. Definition: A pure substance that is

made of only a single type of atom.

Examples: Gold, Iron, Aluminum, Oxygen

Examples: Gold, Iron, Aluminum, Oxygen

SEPARATING ELEMENTS: Cannot be broken apart under normal lab conditions. (heating, exposure to acids, exposure to electricity)

SEPARATING ELEMENTS: Cannot be broken apart under normal lab conditions. (heating, exposure to acids, exposure to electricity)

COMPOUNDCOMPOUNDDefinition: A single molecule of two or more

different ELEMENTS in fixed amounts. Properties are different than the elements that make it.

Definition: A single molecule of two or more different ELEMENTS in fixed amounts. Properties are different than the elements that make it.

Examples: Salt, Sugar, Vinegar, Glass, Water

Examples: Salt, Sugar, Vinegar, Glass, Water

SEPARATING COMPOUNDS: Takes a HUGE amount of energy. Needs to be done chemically.

SEPARATING COMPOUNDS: Takes a HUGE amount of energy. Needs to be done chemically.

MoleculeMolecule

Definition: smallest piece of a compound that maintains its properties.

Definition: smallest piece of a compound that maintains its properties.

MIXTUREMIXTUREDefinition: Combination of:

two or more elements ORtwo or more compounds ORelements and compounds

***individual ingredients KEEP THEIR PROPERTIES

***mixtures are NOT pure substances

Definition: Combination of:two or more elements ORtwo or more compounds ORelements and compounds

***individual ingredients KEEP THEIR PROPERTIES

***mixtures are NOT pure substances

SEPARATING MIXTURES: Easily separated physically (evaporation, strainer, pick out pieces, etc.)

SEPARATING MIXTURES: Easily separated physically (evaporation, strainer, pick out pieces, etc.)

Properties of a mixture VARY. (different throughout)

Properties of a mixture VARY. (different throughout)

Which is a mixture? Which is a compound?

Which is a mixture? Which is a compound?

SaladSoilWater (H2O) Salt and pepperOxygenOcean WaterAirVinegar and oil

SaladSoilWater (H2O) Salt and pepperOxygenOcean WaterAirVinegar and oil

Two types of MIXTURESTwo types of MIXTURES Heterogeneous

Unevenly mixedDoes not appear to be the same

throughoutMost mixtures are heterogeneous EXAMPLES: Sand, Trail Mix, Salad Dressing

Homogeneous Evenly mixedAppears to be the same throughout EXAMPLES: Saltwater, Syrup

HeterogeneousUnevenly mixedDoes not appear to be the same

throughoutMost mixtures are heterogeneous EXAMPLES: Sand, Trail Mix, Salad Dressing

Homogeneous Evenly mixedAppears to be the same throughout EXAMPLES: Saltwater, Syrup

Homogeneous vs. Heterogeneous

Homogeneous vs. Heterogeneous

mixture of elements ME

element E

mixture of compounds MC

compound C

element E

mixture of elements/compounds MEC

mixture of compounds MC

compound C

mixture of molecules and elements MME

•Mixture of Molecules and Elements (MME)

vinegar silicon dioxide (glass)

baking soda sodium chloride (table salt)

The Big IdeaThe Big Idea

The Big Idea:atoms (elements) molecules

(compounds)

group together (in different combinations) to form mixtures

The Big Idea:atoms (elements) molecules

(compounds)

group together (in different combinations) to form mixtures

Combine to form

Animations!Animations!

Beautiful Chemistry - atom/molecule animations

ECM Station ActivityECM Station Activity

You will travel to different stations today.At each station, there is a substance.For each station:

Table #Identify object (what is it?)E,C,M (element, compound, mixture?)WHY? (what property/characteristic makes it

an E,C, or M?

You will travel to different stations today.At each station, there is a substance.For each station:

Table #Identify object (what is it?)E,C,M (element, compound, mixture?)WHY? (what property/characteristic makes it

an E,C, or M?