Chemical & physical properties - Davis School · PDF fileExamples of chemical properties...
Transcript of Chemical & physical properties - Davis School · PDF fileExamples of chemical properties...
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Physical & Chemical
properties“CANDLE Properties”
A. Physical Properties:
• Solid
• Opaque partly transparent partly
• Waxy
• Melting
B. Chemical properties:
• Flammable
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All things are made up of atoms. There are 92
different types of atoms, called elements.
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Each element has different
properties.
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The properties of matter can be grouped
into two categories: physical and
chemical properties.
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Physical and
Chemical Properties
Look in book pg. 80 and pg. 96 to
find the definitions.
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C. Physical Properties• 8 The Physical Properties to memorize:
Mass
Volume
Density
Conductivity (of heat or electricity)
Boiling point/melting point
State of matter
Solubility
Magnetism
(Which of these seems least like a physical property to you?)
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Part A and B
Go to pg. 84 and 85
A. Chart: Fill out the chart.
B. Analysis: Choose one that is least
familiar to you, read about it, then
summarize what you read.
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Other info.
Physical
PropertyEx: Mass Conducti
vity
Volume Boilin
g/metli
ng pt
State
of
matter
Density Solub
ility
Magn
etism
Mini
Picture
Descriptio
n
Amount of
matter.
Similar to
weight.
Other info
(Teacher
notes.
Wait.)
Grams Thermal
OR
Electrical
Liters Temp.
that it
boils
or
melts
Solid
Liquid
Gas
plasma
Equation:
Mass
Volume
Ability
to dissolve
Ex:
Iron
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ConductivityThermal
Conductors
• “Heat can move
through”
• Ex: Metals,
Glass
• Non-Ex:
Styrofoam
Electric
Conductors
• “Electricity can
move through”
• Ex: Silver,
Copper,
Aluminum
• Non-Ex: Glass
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Boiling Pt/Melting Pt
• This is NOT burning!
• Not all things melt or boil!!
• Does wood melt?
• Most biotic (living or once-
living) things DO NOT melt!
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Boiling Pt/Melting PtBoiling Pt
• Liquid to Gas
Temperature
• What is the boiling
pt of water?
Melting Pt/Freezing Pt
• Solid to liquid/liquid to
Solid
• What is the melting/
freezing pt of water?
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State of Matter
Solid
Liquid
Gas
Plasma
• Similar to gas
• Electrically conductive
• Magnetic.
• “A sea of charged
particles”
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Solubility… “Dissolvability”
The ability of a
substance to
dissolve in a
liquid
Why is this a
physical
property?
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H. Crime Scene…
• List the physical and chemical
properties of object.
• Class will need to guess your
object.
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Objects for the
tables…
Paper
Candle
Crayon
Christmas lights
Flash Light
Alka-selzer packet
Toy Car
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• What are some physical
properties of salt?
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Starter– Comp. notebook
Write the objective in your notebook:
Objective: To learn the chemical and physical
properties of elements on the periodic table.
Today: Quiz on properties. Bring colored
pencils, if you have any.
Intern: Please pass back papers today.
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Chemical properties...1. Definition– Can only be observed as it
changes to a different type of matter.
(Changes to a new molecule.)
The ability to change into something new.
How it reacts with others.
2. Chemical Properties to memorize:
1. Flammability
2. Rustability
3. Reacts with water
4. Reacts with acid
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3. Examples of chemical properties are...
Paper burns
Iron (Fe) rusts
CO2 doesn’t burn
Silver (Ag) doesn’t react w/water
Copper (Cu) reacts with Oxygen (tarnishes)
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•During a chemical change, the substance may…
React
Rust
Tarnish
Corrode
Explode
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Lets Review…Physical Properties: properties we can
measure without changing the identity of
the matter.
Chemical Properties: a substance’s ability
to change into something new. It can only
be observed while the change is taking
place.
(We use these properties to distinguish
chemicals from one another)
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E. Physical vs.
chemical properties
• Wood
Physical Property:
Chemical Property:
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E. Physical vs.
chemical properties
• Wood
Physical Property:
Chemical Property:
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F. PHYSICAL VS. CHEMICAL
PROPERTIES
Baking Soda
Physical Property: white powder
Chemical Property: Reacts with
vinegar to produce bubbles
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G. Chemical vs.
physical properties
Iron
Physical Property: Malleable
(able to be shaped)
Chemical Property: Reacts
with oxygen to form rust
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Periodic Table Properties
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ALKALI METALS(Blue)
PHYSICAL PROPERTIES:
Soft and silvery
Metal
Conduct electricity
Solids (at room temperature)
CHEMICAL PROPERTIES:
Very reactive with water (explode)
Image: http://www.learner.org/interactives/periodic/groups2.html
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ALKALINE EARTH METALS(Green) PHYSICAL
PROPERTIES:
White and malleable
Conduct electricity
Solids
CHEMICAL PROPERTIES:
React with water
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TRANSITION METALS(purple) PHYSICAL
PROPERTIES:
Conduct heat and electricity.
Solids and 1 liquid (mercury)
CHEMICAL PROPERTIES: Varies. Some bond with many
others (Copper). Some don’t bond with
very many (Gold)
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BORON, CARBON, NITROGEN, & OXYGEN FAMILIES (4 rows)
PHYSICAL PROPERTIES:
Solids
Metals and non-metals
CHEMICAL PROPERTIES:
Combine to form LIVING things.
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HalogensPHYSICAL
PROPERTIES:
Dense
Non-metals
Gasses and liquid
CHEMICAL PROPERTIES:
Very reactive with group 1 (Alkali Metals)
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Noble GasesPHYSICAL
PROPERTIES:
Gases
Non-metals
CHEMICAL PROPERTIES:
Not reactive at all!
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Rare Earth MetalsPHYSICAL PROPERTIES:
Silvery or gray metals
Conduct electricity
CHEMICAL PROPERTIES:
Radioactive
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Science Journal
1. The difference between
physical and chemical
properties is …
2. The 8 physical properties I
need to memorize are….
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Science Journal1. The difference between physical
and chemical properties is… that
physical properties can be
measured/observed without
changing the identity.
2. The 8 physical properties I need
to memorize are…mass, volume,
density, magnetism, solubility,
conductivity, melting/boiling pt,
state of matter