9/29/11
description
Transcript of 9/29/11
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9/29/11I -STARTER: Warm upTape in
Your Warm up and Comple
te
Justify Your
Answer Choice:
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9/29/11
Tape in Your
Warm up and Comple
te
Justify Your
Answer Choice:
I -STARTER: Warm up
II- PRACTICE: We will begin looking at and discussing different elements.
Your notes from the discussion will go here to help you prepare for future activities and discussions about elements.
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IT’S ALL ELEMENTALElements are all around us … can you recognize them when you see
them?
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What is an element? An element is a pure substance that
cannot be broken down by chemical means into other substances.
A compound contains two or more elements
. Everything is made up of elements.
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What element is this?
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Copper –Cu
Used in: wiring heat sinks Coins brass and bronze
alloys (metal mixtures).
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But is it really Copper? Lincoln Memorial penny
dated before 1982 - made of 95% copper.
dated after 1983 - made of 97.5% zinc and plated with a thin copper coating.
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What element is this?
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Nickel –Ni classified as
an element in 1751.
The Nickel (five-cent) coin – made of 75% copper. Only 25% is nickel, It
actually has more copper than the penny!
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What element is in this picture?
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Helium –He
Colorless gas glows pale peach
when an electric current runs through it
Used to make balloons float
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What element is this?
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Aluminum –Al Malleable shaped into
interesting,beautifuland usefulobjects, like soda cans.
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What element is this?
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Carbon – C A diamond, but
heat it too much and it burns up into carbon dioxide gas.
Graphite used in pencils
Coal
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What element is this?
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Calcium –Ca most people think
of chalk and bones Actually…a silvery
metal that reacts with water to give off hydrogen gas
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What element is shown here?
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Iron –Fe Meteorite (from
ancient Mexico - made mostly of iron.
Locals created tools from
first samples made their way out to the world in the 1700s
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What element is this?
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Iodine –I gives off violet
vapor when heated used as
disinfectants for cuts and wounds before antiseptic agents were found.
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What element is this?
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Lead –Pb
Usually seen as Lead pipes
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Elements Are All Around Us All of these elements are found within the
Earth, atmosphere, oceans and even in your all living things.
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Silicon –Si
computer chips
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Nitrogen –N 78% of the
atmosphere
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Hydrogen –H
75% universe is hydrogen, a colorless gas.
The Sun is composed of Hydrogen & Helium
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Chlorine –Cl purifies drinking
water and swimming pools.
Combined with sodium, makes table salt
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Silver (Ag) and Gold (Au)
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Phosphorous –P Used in matches
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Sulfur –S
Has a very distinguishable smell
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Sodium –Na exposed to water -
explode in flaming balls of molten sodium.
Mix with Chlorine -creates table salt.
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It’s Oxygen –O Colorless gas Blue liquid
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9/29/11
Tape in Your
Warm up and Comple
te
Justify Your
Answer Choice:
I -STARTER: Warm up
II- PRACTICE: We will begin looking at and discussing different elements.
Your notes from the discussion will go here to help you prepare for future activities and discussions about elements.
III- APPLICATIONExplain how the physical properties of an element determine how we use that element
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9/29/11
Tape in Your
Warm up and Comple
te
Justify Your
Answer Choice:
I -STARTER: Warm up
II- PRACTICE: We will begin looking at and discussing different elements.
Your notes from the discussion will go here to help you prepare for future activities and discussions about elements.
III- APPLICATIONExplain how the physical properties of an element determine how we use that element
IV –CONNECTIONS:Knowing what you have learned about metals, nonmetals, and elements explain:•Why do jewelers use metals instead of nonmetals to make jewelry?
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9/29/11
Tape in Your
Warm up and Comple
te
Justify Your
Answer Choice:
I -STARTER: Warm up
II- PRACTICE: We will begin looking at and discussing different elements.
Your notes from the discussion will go here to help you prepare for future activities and discussions about elements.
III- APPLICATIONExplain how the physical properties of an element determine how we use that element
IV –CONNECTIONS:Knowing what you have learned about metals, nonmetals, and elements explain:•Why do jewelers use metals instead of nonmetals to make jewelry?
V -EXIT: Writing 3-4 sentences summarizing what we have learned so far about elements