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# What’s the MATTER Classify Matter

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What’s the MATTER Classify Matter

Matter, Classify Matter At the conclusion of our time together, you should be able to:
Classify a mixture of matter based on their physical and chemical properties Characterize various types of matter

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Types of Matter Pure Substance- Matter with a fixed composition
It has distinct properties Examples = elements compounds

Types of Matter Mixtures- Most matter is a mixture
The composition is not fixed (changes from sample to sample) Two Types – Homogeneous Heterogeneous

Homogeneous Mixtures Composition is uniform throughout Solution-
Particle size = 0.01 – 1 nm Doesn’t settle out upon standing Can’t be separated by filtering Doesn’t scatter light Example = salt water

Homogeneous Mixtures Colloid- Particle size = 1 – 1000 nm
Doesn’t settle out upon standing Can’t be separated by filtering Scatters light (Tyndall Effect) Examples = milk, gelatin, smoke

Heterogeneous Mixtures - Suspension
The sample varies in composition, properties and appearance No uniformity If a suspension: Particle size is greater than 1000 nm Particles settle out upon standing Can be separated by filtration Might scatter light Examples = soil, trail mix, pond water

Don’t Let This Stuff Bite You!!!!

Let’s Look at Some Examples:
Mixtures are variable combinations of 2 or more pure substances. Heterogeneous – visibly separate phases Homogeneous – Same throughout

Pure substance vs. Mixture
Only ONE element has 2 or more or compound elements/ (distilled water) compounds.

Distilled Water is a compound. an element. a solution. a mixture.

Air is a mixture of several gases.
Name Formula amount Nitrogen N % Oxygen O % Argon Ar % Carbon CO % Dioxide

Noble (inert) Gas Air is a mixture of several gases
Name Formula Amount Neon Ne % Methane CH % Helium He % Krypton Kr % Hydrogen H % Xenon Xe % Noble (inert) Gas

Atoms are NOT the same as molecules.
Air and oxygen are NOT the same. Helium and hot air are NOT the same.

Helium and hot air are NOT the same.

What’s the MATTER Classify Matter
Let’s Put it All Together in a Chart!!

MATTER No Yes Can it be physically separated? MIXTURE PURE SUBSTANCE
Is the composition uniform? No Yes Can it be chemically decomposed? No Yes Homo- geneous Mixture (solution) Hetero- geneous Mixture Compound Element Suspensions Colloids

I don’t feel so stupid now…

Matter, Classify Matter Let’s see if you can:
Classify a mixture of matter based on their physical and chemical properties Characterize various types of matter

Putting sand and salt together makes
a compound. an element. a mixture. a solution.

Pure Water is a compound. an element. a solution. a mixture.

Tap Water is a compound. an element. a solution. a mixture.

Familiar Saying A beholden vessel never exceeds degrees Fahrenheit. A watched pot never boils!

An atom is to an element, as a molecule is to a
metal. nonmetal. metalloid. compound.

If different kinds of atoms are represented by different colored dots, which picture represents a sample of a compound?

If different kinds of atoms are represented by different colored dots, which picture below represents a mixture?

Which of the following illustrations represents a pure substance?

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Salt (NaCl) is a common substance. Salt is which of these?
atom element compound mixture

A chocolate chip cookie is an example of a __________,
A chocolate chip cookie is an example of a __________, because ______________. a. compound, the ingredients are chemically bonded. b. compound, it is the same throughout. c. mixture, you can separate out the chips. d. mixture, you cannot distinguish between the ingredients.

Which formulas represent compounds?
O2, H2O2 CO2, H2O H2, CO2 H2, O2

Which of the following is a compound?
oxygen water nitrogen air

I don’t feel so stupid now…

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