Welcome of Chemistry 
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Full Report on Liquid Lab Density Due!
Questions
Slope for Solid Density Lab?
 Bonus Points for Solid Density Lab
 Element profiling Book Project
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18 Elements Quiz 
Finish notes on Math Skills
Notes on Matter and Its Property
Create a graphic organizer
 Practice problems
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Warm-Up
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What is Matter?
18 Elements Quiz
1.
2.
3.
4.
5.
He = _________
Si = _________
F = __________
Be = _________
Mg = _________
6. Lithium = _________
7. Sodium = ___________
8. Chlorine = __________
9. Atomic #1 = ________
10. Atomic #4 = ________
Ch. 1: Matter and
Change
1.2 Matter and Its Properties
Terms
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Matter- anything that has mass and volume
Atom- smallest unit of an element that keeps the
properties of element
Element- pure substance made of only one type of
atom
Compound- substance made of 2 or more types of
atoms that are chemically bonded
Molecule- type of compound in which bonds are
covalent bonds
Properties of Matter
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chemists use characteristic properties to tell
substances apart and to separate them
some properties define a group of substances
Types of Properties
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Extensive- depend on the amount of matter
Ex: volume, mass, amount of energy
Intensive- do not depend on the amount
Ex: density, boiling point, ability to conduct
Types of Properties
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Physical- characteristics
that can be observed or
measured without
changing the identity of a
substance
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Chemical- relates to a
substances ability to
undergo changes that
transform it into a
different substance
Easiest to see when a
chemical is reacting
Physical Changes in Matter
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change in a substance
that doesn’t change
the identity of the
substance
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Ex. grinding, cutting,
melting, boiling
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Includes all changes
of state (physical
changes of a
substance from one
state to another)
States of Matter
Solids
Molecular motion?
 Shape and volume?
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Liquids
Molecular motion?
 Shape and volume?
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Gases
 Molecular motion and
spacing?
 Shape and volume?
Plasma
 Temporary, high-energy state of
molecules
 Exists on the sun, in neon lights,
and lightning
http://www.thestormsho
p.com/clips.htm
What is
temperature?
How does
temperature
affect the state
of a
substance?
Melting
solid
liquid
Does size affect
melting point?
Different substances have different
melting points.
Freezing
liquid
solid
A substance freezes and melts at
the same temperature.
Boiling
liquid
gas
Different substances have different
boiling points.
Condensation
gas
liquid
Why does your glass get
“sweaty”?
Condensation and boiling occur at
the same temperature.
Sublimation
directly from
solid
gas
Can you think of
something that
sublimes?
Deposition
directly from
gas
solid
Water vapor in the
freezer becomes
frost
Changes of State
State Change Diagram for Water
473
Steam
T
e
m
p
e
r
a
t
u
r
e
373
Water & Steam
Boiling/condensing
point
intermolecular forces
weakened
Water
273
Ice &
Water
Melting/
freezing point
intermolecular forces dominate
Ice
(K)
0
Mix
Liquid
Mixture
Solid
Heat
Gas
Chemical Changes in Matter
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a change in which a substance is converted into
a different substance
same as chemical reaction
doesn’t change the amount of matter present
reactantssubstances that react
productssubstances that are produced
mercury + iodine  mercuric iodide
Energy Changes in Matter
when any change occurs, energy is always
involved
 energy can be in different forms (light,
heat, etc.)
 energy is never destroyed or created (law of
conservation of energy)
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Energy Changes in Matter
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Exothermic Reaction- reaction that gives off
energy (feels warm on outside)
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Endothermic Reaction- reaction that uses up
energy (feels cold on outside)