# Elements_ Compounds_ Mixtures by yurtgc548

VIEWS: 4 PAGES: 60

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```									Elements and Compounds

Composition of Matter
Early Man (4 mya)
Man begins to use fire and stone
tools (2 mya)
Cro-Magnon man is a skilled hunter
(0.03 mya).
HEY!
Where’s all the skateboards and
CDs and Gameboys?
How did all our stuff get here?
How did all our stuff get here?
• 1) We found different materials like plastic,
steel and concrete buried in deep mines
• 2) Different materials blow out of
volcanoes at different times
• 3) A few dozen materials make everything
in the universe
Element = Type of atom
(An atom is the smallest particle of
matter)
Mercury
Copper
Oxygen
Silver
Gold
Tungsten
Americium
Aluminum
Element = Type of atom
(An atom is the smallest particle of
matter)
Molecule
(Two or more atoms bonded
together)
Is there more than one atom here?
Are these molecules?
To make a molecule,
1) you can use different elements and
thousands of atoms
2) you can use more than two atoms, but
they must all be the same element
3) you must use only two atoms, but they
can be different elements
Molecule
(Two or more atoms bonded
together)
Molecules can have huge numbers
of different atoms
Or molecules can have just two
atoms of the same kind.
Molecules are the same as
compounds.
• 1) False

• 2) True
Let’s build a molecule
(a compound)!
To make the compound salt, we
need
• 1) two white powders to mix together
• 2) a yellow gas and a white solid to mix
together
• 3) two gray powders that turn white when
you mix them together
The solid metal sodium and the
poisonous gas chlorine mix together to
form SALT!
Hydrogen gas plus oxygen gas
makes WATER!
Burning a piece of coal makes
CARBON DIOXIDE
When different elements are mixed
together, you make
• 1) a compound that has the same
properties as the elements
• 2) a compound that has different
properties than the elements
• 3) a molecule that has different properties
than the elements
• 4) a white powder
• 5) 2 and 3
We started with atoms:
Two or more bonded together
make a compound
Can we mix compounds together
to make mixtures?
Most foods and drinks are
mixtures.
Clothing materials are often
mixtures.
There are different types of
mixtures:

Solutions
Colloids
Suspensions
SOLUTIONS
Solutions contain small molecules
What are some more examples of
solutions?
•   2) hot chocolate
•   3) hot chocolate with marshmallows
•   4) 1 and 2
•   5) 1 and 2 and 3
In a solution, compounds are
•   1) concentrated
•   2) dilute
•   4) foggy
•   5) sweet
In a solution, do particles settle to
the bottom?
• 1) Yes

• 2) No
Stainless steel (silverware) is an
alloy.
An alloy is a solution containing:
•   1) gas in liquid
•   2) liquid in liquid
•   3) solid in liquid
•   4) solid in solid
Air is a solution containing:
•   1) gas in liquid
•   2) gas in gas
•   3) gas in solid
•   4) liquid in gas
There are different types of
mixtures:

Solutions
Colloids
Suspensions
Let’s look next at
COLLOIDS
Fog is a colloid.
Light beams get “scattered”
through colloids.
In a colloid, the particles are
_________ than in a solution.
• 1) smaller

• 2) larger

• 3) colder

• 4) hotter
In a colloid, do particles settle to
the bottom?
• 1) Yes

• 2) No
There are different types of
mixtures:

Solutions
Colloids
Suspensions
Next, let’s check out
SUSPENSIONS
(No, you’re not in trouble)
Muddy water is a suspension.
In a suspension, particles are
_________ than in a solution.
•   1) larger
•   2) smaller
•   3) darker
•   4) lighter
In a suspension, do particles settle
to the bottom?
• 1) Yes

• 2) No

• 3) Depends on the temperature
How do we describe
mixtures?
Solute
Solvent
Which of the following is NOT a
solute in a solvent?
•   1) Koolaid in water
•   2) Cream in coffee
•   3) Vinegar in oil
•   4) Carbon dioxide bubbles in pop
Which of the following are
mixtures?
•   1) colloids, suspensions, solutions
•   2) suspensions, solutes, solvents
•   3) alloys, solutes, solvents
•   4) gases, liquids, solids

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