Elements An ___________is a substance that contains only a singe type of ________. The __________of atoms does not matter as long as they are all the same.

Elements

• An ___________is a substance that contains only a singe type of ________.

• The __________of atoms does not matter as long as they are all the same type.

• Elements ___________be separated into other substances. – Examples: gold, silver, helium, oxygen

Compounds

• A _______________is a substance that consists of two or more different types of atoms ___________together. – Example: Table salt is a compound because it is

made of sodium and chlorine.

H2O

CO2

NaCl

Mixtures

• A __________is a combination of different substances that remain the same individual substances and can be separated by ____________means. – Example: A bowl of apples, oranges, and bananas

can be separated by physically removing them from the bowl.

Pictures from Chem 4 kids

Comparing Mixtures and Compounds

Mixtures Compounds

Parts of a Mixture

• Homogenous Mixtures – when substances are _______spread throughout a mixture.– Examples: mixing sugar into a cup of water,

homogenized milk• Heterogeneous Mixtures – when substances

are _______evenly spread throughout a mixture– Examples: soil, salsa

Homogeneous Mixture

• “Homo” means the same • has the same uniform appearance and

composition throughout; maintain one phase (solid, liquid, gas)

• Commonly referred to as solutions• Example:

Salt WaterNotice the

uniformappearance

Solution

• a mixture of two or more substances that is identical throughout

• can be physically separated• composed of solutes and solvents

the substance in the smallest amount and the one that dissolves in the solvent

the substance in the larger

amount that dissolves the solute

Colloids (milk, fog, jello) are considered solutions. Particles are microscopically dispersed.

Iced Tea Mix(solute)

Water(solvent)

Iced Tea(solution)

Salt water is considered a

solution. How

can it be physically separated?

Colloids (heterogeneous)

A colloid is a mixture where very small particles of one substance are evenly

distributed throughout another substance. They appear very similar to solutions, but the particles are suspended in the solution rather than fully dissolved. The difference between a colloid and a suspension is that the particles will not settle to the bottom over a period of

time, they will stay suspended or float.

Heterogeneous Mixture

• “Hetero” means different• consists of visibly different substances

or phases (solid, liquid, gas) • a suspension is a special type of

heterogeneous mixture of larger particles that eventually settle

• Example:

Trail Mix

Notice thevisibly

differentsubstance

s

Suspensions Properties

• Suspensions separate into layers over time• Particles are larger than those in a solutions• Examples: Sand in water, muddy water, salad

Homogenous or Heterogeneous?

Homogenous or Heterogeneous?

Homogenous or Heterogeneous?

Element, Compound, or Mixture?

Copper

Element, Compound, or Mixture?

CopperCu

Element, Compound, or Mixture?

Rocks

Element, Compound, or Mixture?

Rocks

Element, Compound, or Mixture?

Jelly Beans

Element, Compound, or Mixture?

Jelly Beans

Element, Compound, or Mixture?

Table Sugar

Element, Compound, or Mixture?

Table Sugar

C 12H 22O 11

Element, Compound, or Mixture?

Diamond

Element, Compound, or Mixture?

DiamondC

Element, Compound, or Mixture?

Tea

Element, Compound, or Mixture?

Tea

Element, Compound, or Mixture?

Salt

Element, Compound, or Mixture?

SaltNaCl

Element, Compound, or Mixture?

Neon Gas

Element, Compound, or Mixture?

Neon GasNe

Element, Compound, or Mixture?

Salad

Element, Compound, or Mixture?

Salad

Element, Compound, or Mixture?

Pure Water

Element, Compound, or Mixture?

Pure WaterH 2O

Element, Compound, or Mixture?

Aluminum

Element, Compound, or Mixture?

AluminumAl

Element, Compound, or Mixture?

Lemonade

Element, Compound, or Mixture?

Lemonade

Element, Compound, or Mixture?

Silver

Element, Compound, or Mixture?

SilverAg

Element, Compound, or Mixture?

Sand

Element, Compound, or Mixture?

Sand