What’s the Matter? With Matter Matter is the Stuff Around You!
What’s the MATTER Classify Matter
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Transcript of What’s the MATTER Classify Matter
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What’s the MATTER Classify Matter
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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
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Types of Matter
Pure Substance- Matter with a fixed composition It has distinct properties Examples = elements
compounds
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Types of Matter
Mixtures- Most matter is a mixture The composition is not fixed (changes
from sample to sample) Two Types –
HomogeneousHeterogeneous
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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
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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
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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
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Let’s Look at Some Examples: Mixtures are variable combinations of 2 or
more pure substances.
Heterogeneous –visibly separate phases
Homogeneous – Same throughout
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Pure substance vs. MixtureOnly ONE element has 2 or more or compound. elements/ (distilled water) compounds.
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Distilled Water is a compound. an element. a solution. a mixture.
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Air is a mixture of several gases.
Name Formula amountNitrogen N2 78 % Oxygen O2 21 % Argon Ar 1 % Carbon CO2 0.03 %
Dioxide
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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 %
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Atoms are NOT the same as molecules. Air and oxygen are NOT the same. Helium and hot air are NOT the same.
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Helium and hot air are NOT the same.
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What’s the MATTER Classify Matter
Let’s Put it All Together in a Chart!!
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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
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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
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Putting sand and salt together makes
a compound. an element. a mixture. a solution.
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Pure Water is a compound. an element. a solution. a mixture.
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Tap Water is a compound. an element. a solution. a mixture.
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An atom is to an element, as a molecule is to a
metal. nonmetal. metalloid. compound.
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If different kinds of atoms are represented by different colored dots, which picture represents a
sample of a compound?
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If different kinds of atoms are represented by different
colored dots, which picture below represents a mixture?
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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
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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.
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Which formulas represent compounds?
O2, H2O2 CO2, H2O
H2, CO2
H2, O2
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Which of the following is a compound? • oxygen • water • nitrogen • air