Classification Of Matter 2

(1-2) Matter and its properties Part III

Classification of Matter

Different kinds of matter... Air

Gold Salad

Granite sugar in water

Water

Salt

Matter yes

Can it be separated?

Pure substances

Mixtures

Can it be decomposed by ordinary chemical means?

Is the composition uniform?

yes

No

No

Homogeneous Heterogeneous mixture mixture (Solution)

yes Compounds

No Elements

Based on the previous classification scheme, can you classify the kinds of matter illustrated? • Which can be separated? Granite

Air sugar in water

• So, these are Mixtures! But which type of mixtures? Homogeneous or heterogeneous?

Salad

Uniform

Not uniform

Air Salad

sugar in water

Homogenous Mixtures

Granite

Heterogeneous Mixtures

Now... Those that can’t be separated are Pure Substances

Water

Salt

Gold Bur are they Compounds or Elements?

Which can be decomposed by chemical means, like heating, electricity...and which cannot? Compounds

Elements

Water

Salt

Gold

Summary... • Matter can be classified into: Mixtures and pure substances. • Mixtures can be homogenous or heterogeneous. – Homogeneous mixtures: Uniform – Heterogeneous mixtures: Not Uniform

• Pure substances can be elements or compounds. – Elements can’t be decomposed. – Compounds can be decomposed by chemical means.

The End