Download Elements, Compounds and Mixtures

DO NOW – see board for example
1. Cut the INB template out
and glue along the narrow
tabs into notebook.
2. Fold each side back and
add notes under each
section.
3. You will refer back to this
page several times as you
view this presentation.
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Elements and
Compounds
Presented by Kesler Science
Essential Questions:
What is the difference
between elements,
compounds, and mixtures?
Elements and Compounds
Dmitri Mendeleev
• Russian chemist and inventor
• Arranged the periodic table
by atomic weight and similar
properties
• Predicted the properties of
eight elements yet to be
discovered
Elements and Compounds
Matter
How is matter
classified?
Pure
Substance
Element
Mixture
Compound
Elements and Compounds
Matter
• Everything around you
• Anything that has mass
and takes up space
• Atoms and molecules are
all composed of matter.
• Can be solid, liquid, or gas
Elements and Compounds
Solid Phase of Matter
• Has a definite volume
and definite shape
• Molecules are tightly
packed.
• Does not flow easily –
particles cannot
move/slide past one
another
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Elements and Compounds
Liquid Phase of Matter
• Has a definite volume but no
definite shape
• Flows easily particles can move past one
another
• Lots of free space between
particles
• Takes the shape of their
containers
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Elements and Compounds
Gas Phase of Matter
• Has no definite shape or
definite volume
• Lots of free space between
particles
• Flows easily particles can move past
one another
• Takes the shape and
volume of its container.
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Elements and Compounds
Pure Substance
• Has a definite and
constant composition
• Can be either an
element or a compound
• The composition of a
pure substance doesn’t
vary.
• Ex: salt or sugar
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Element
H
Compound
H2
Compound
H2O
Elements and Compounds
Molecule
• 2 or more atoms bonded together
• Represents the smallest particle in a
chemical compound that can take place
in a chemical reaction.
• Has the same chemical properties of that
element or compound.
• Some molecules consist of two atoms of
the same element.
• Ex. O2
• Other molecules consists of two or more
atoms.
• Ex. (H2O)
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Elements and Compounds
Element
• A pure substance that
cannot be broken down
into any other
substance.
• It is represented on the
periodic table by a
symbol.
• Ex: Au is Gold
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Au
Au
Au
Elements and Compounds
Compounds
• A pure substance formed
when one or more
elements have chemically
combined through a
chemical reaction to form a
new substance
• It is represented by a
formula.
• Ex: NaCl - Sodium Chloride
(salt)
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Cl
H
Na
O
H
Quick Action – INB Template
1. Cut the INB template out and
glue along narrow tabs into
notebook.
2. Research using the web to find
the most abundant elements
percentage in Earth’s crust,
Earth’s atmosphere, Earth’s
oceans, and Earth’s living
matter.
3. Create pie charts to represent
each.
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Quick Action – INB Template
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Elements and Compounds
Counting elements in a
molecule
• Count the number of
different capital letters or
element symbols in the
compound.
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Quick Action – Elements and Compounds
1. Get with your table and
discuss how to count the
number of different
elements in a compound.
Formula
H2O
NaCl
2. Complete the chart by
counting the elements and
naming them.
C6H12O6
NaOH
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# of different
elements
Name of
elements
Quick Action – INB Template
1. Cut out the INB template
and glue along the
narrow tab.
2. Looking at the formula,
decide if it is a
compound or an
element.
3. Name each element in
the formula.
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Elements and Compounds
Mixture
• A combination of
many different
elements
• Not chemically
combined
• Can be separated
• Ex: Trail mix
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Check for Understanding
Can you…
Differentiate between
elements, compounds,
and mixtures?
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