Composition of Composition of MatterMatter

• All matter is made up of atoms.

• Elements- when all the atoms in the matter are the same.

• There are 118 elements.

• Ex: Carbon and Oxygen

CompoundsCompounds

• Compounds- matter that is made up of 2 or more combined elements.

• Compounds look different than the elements that make them up.

Compound Ex:Compound Ex:

• Ex: H & O = H2O

C & O = CO2

C,H & O = C6H12O6

SubstanceSubstance

• Substance- matter that is either an element or a compound.

MixtureMixture

• Mixture- material that is made up of 2 or more substances that can be separated physically.

2 Types of Mixtures2 Types of Mixtures

• Heterogeneous

• Homogeneous

Heterogeneous MixturesHeterogeneous Mixtures

• Heterogeneous Mixture- mixture that is unevenly mixed.

• You can see the stuff in the mixture.

Heterogeneous Mixture Ex:Heterogeneous Mixture Ex:

Homogeneous MixtureHomogeneous Mixture

• Homogeneous Mixture- mixture that is evenly (uniformly) mixed.

• Homogeneous Mixtures are also called solutions.

Homogeneous Mixture Ex:Homogeneous Mixture Ex:

Matter

Substance Mixture

Element Compound Homogeneous Heterogeneous

ColloidColloid

• Colloid- a heterogeneous mixture that never settles.

• Ex: milk or fog

SuspensionSuspension

• Suspension- heterogeneous mixture that contains a liquid where visible particles settle.

Suspension ExamplesSuspension Examples

Tyndall EffectTyndall Effect

• Tyndall Effect- the scattering of light by particles in a mixture.

Tyndall Effect Ex:Tyndall Effect Ex:

What do you have?What do you have?

Solution Colloid Suspension

Does it settle?

NO NO YES

Can it be filtered?

NO NO YES

Does it scatter light?

NO YES YES