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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. Types of Matter. Pure Substance- - PowerPoint PPT Presentation
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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:
1. Classify a mixture of matter based on their physical and chemical properties
2. Characterize various types of matter
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 –
HomogeneousHeterogeneous
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
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
Homogeneous Mixtures
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
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. MixtureOnly 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 amountNitrogen N2 78 % Oxygen O2 21 % Argon Ar 1 % Carbon CO2 0.03 %
Dioxide
Air is a mixture of several gases
Name Formula AmountNeon Ne 0.002 % Methane CH4 0.0002 % Helium He 0.000524 % Krypton Kr 0.000114 % Hydrogen H2 0.00005 % Xenon Xe 0.0000087 %
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!!
Is the composition uniform?
NoYes
MATTERCan it be physically
separated?
Homo-geneous Mixture
(solution)
Hetero-geneous Mixture Compound
MIXTURE PURE SUBSTANCE
Yes No
Can it be chemically decomposed?
NoYes
Suspensions
Element
Colloids
Matter, Classify Matter
Let’s see if you can:
1. Classify a mixture of matter based on their physical and chemical properties
2. 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.
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?
Salt (NaCl) is a common substance. Salt is which of these?
atom element
compound mixture
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
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