9/29/11 I -STARTER: Warm up Tape in Your Warm up and Complet e Justify Your Answer Choice:
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Transcript of 9/29/11 I -STARTER: Warm up Tape in Your Warm up and Complet e Justify Your Answer Choice:
9/29/11I -STARTER: Warm upTape in
Your Warm up and Comple
te
Justify Your
Answer Choice:
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.
IT’S ALL ELEMENTALElements are all around us … can you recognize them when you see
them?
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.
What element is this?
Copper –Cu
Used in: wiring heat sinks Coins brass and bronze
alloys (metal mixtures).
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.
What element is this?
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!
What element is in this picture?
Helium –He
Colorless gas glows pale peach
when an electric current runs through it
Used to make balloons float
What element is this?
Aluminum –Al
Malleable shaped into
interesting,beautifuland usefulobjects, like soda cans.
What element is this?
Carbon – C
A diamond, but heat it too much and it burns up into carbon dioxide gas.
Graphite used in pencils
Coal
What element is this?
Calcium –Ca
most people think of chalk and bones
Actually…a silvery metal that reacts with water to give off hydrogen gas
What element is shown here?
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
What element is this?
Iodine –I
gives off violet vapor when heated
used as disinfectants for cuts and wounds before antiseptic agents were found.
What element is this?
Lead –Pb
Usually seen as Lead pipes
Elements Are All Around Us
All of these elements are found within the Earth, atmosphere, oceans and even in your all living things.
Silicon –Si
computer chips
Nitrogen –N
78% of the atmosphere
Hydrogen –H
75% universe is hydrogen, a colorless gas.
The Sun is composed of Hydrogen & Helium
Chlorine –Cl
purifies drinking water and swimming pools.
Combined with sodium, makes table salt
Silver (Ag) and Gold (Au)
Phosphorous –P
Used in matches
Sulfur –S
Has a very distinguishable smell
Sodium –Na exposed to water -
explode in flaming balls of molten sodium.
Mix with Chlorine -creates table salt.
It’s Oxygen –O
Colorless gas Blue liquid
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
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?
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