elements an ___________is a substance that contains only a singe type of ________. the __________of...
TRANSCRIPT
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Elements
• An ___________is a substance that contains only a singe type of ________.
• The __________of atoms does not matter as long as they are all the same type.
• Elements ___________be separated into other substances. – Examples: gold, silver, helium, oxygen
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Compounds
• A _______________is a substance that consists of two or more different types of atoms ___________together. – Example: Table salt is a compound because it is
made of sodium and chlorine.
H2O
CO2
NaCl
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Mixtures
• A __________is a combination of different substances that remain the same individual substances and can be separated by ____________means. – Example: A bowl of apples, oranges, and bananas
can be separated by physically removing them from the bowl.
Pictures from Chem 4 kids
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Comparing Mixtures and Compounds
Mixtures Compounds
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Parts of a Mixture
• Homogenous Mixtures – when substances are _______spread throughout a mixture.– Examples: mixing sugar into a cup of water,
homogenized milk• Heterogeneous Mixtures – when substances
are _______evenly spread throughout a mixture– Examples: soil, salsa
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Homogeneous Mixture
• “Homo” means the same • has the same uniform appearance and
composition throughout; maintain one phase (solid, liquid, gas)
• Commonly referred to as solutions• Example:
Salt WaterNotice the
uniformappearance
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Solution
• a mixture of two or more substances that is identical throughout
• can be physically separated• composed of solutes and solvents
the substance in the smallest amount and the one that dissolves in the solvent
the substance in the larger
amount that dissolves the solute
Colloids (milk, fog, jello) are considered solutions. Particles are microscopically dispersed.
Iced Tea Mix(solute)
Water(solvent)
Iced Tea(solution)
Salt water is considered a
solution. How
can it be physically separated?
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Colloids (heterogeneous)
A colloid is a mixture where very small particles of one substance are evenly
distributed throughout another substance. They appear very similar to solutions, but the particles are suspended in the solution rather than fully dissolved. The difference between a colloid and a suspension is that the particles will not settle to the bottom over a period of
time, they will stay suspended or float.
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Heterogeneous Mixture
• “Hetero” means different• consists of visibly different substances
or phases (solid, liquid, gas) • a suspension is a special type of
heterogeneous mixture of larger particles that eventually settle
• Example:
Trail Mix
Notice thevisibly
differentsubstance
s
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Suspensions Properties
• Suspensions separate into layers over time• Particles are larger than those in a solutions• Examples: Sand in water, muddy water, salad
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Homogenous or Heterogeneous?
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Homogenous or Heterogeneous?
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Homogenous or Heterogeneous?
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Element, Compound, or Mixture?
Copper
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Element, Compound, or Mixture?
CopperCu
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Element, Compound, or Mixture?
Rocks
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Element, Compound, or Mixture?
Rocks
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Element, Compound, or Mixture?
Jelly Beans
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Element, Compound, or Mixture?
Jelly Beans
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Element, Compound, or Mixture?
Table Sugar
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Element, Compound, or Mixture?
Table Sugar
C 12H 22O 11
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Element, Compound, or Mixture?
Diamond
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Element, Compound, or Mixture?
DiamondC
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Element, Compound, or Mixture?
Tea
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Element, Compound, or Mixture?
Tea
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Element, Compound, or Mixture?
Salt
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Element, Compound, or Mixture?
SaltNaCl
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Element, Compound, or Mixture?
Neon Gas
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Element, Compound, or Mixture?
Neon GasNe
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Element, Compound, or Mixture?
Salad
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Element, Compound, or Mixture?
Salad
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Element, Compound, or Mixture?
Pure Water
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Element, Compound, or Mixture?
Pure WaterH 2O
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Element, Compound, or Mixture?
Aluminum
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Element, Compound, or Mixture?
AluminumAl
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Element, Compound, or Mixture?
Lemonade
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Element, Compound, or Mixture?
Lemonade
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Element, Compound, or Mixture?
Silver
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Element, Compound, or Mixture?
SilverAg
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Element, Compound, or Mixture?
Sand
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Element, Compound, or Mixture?
Sand