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What is Chemistry?
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Chemistry studies the
–Composition–Structure–Properties–Transformations
of matter
(What it’s made of)
(How it’s arranged) (Characteristics)
(Behavior)
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What is Matter?
• Anything that has mass & occupies space.
Which of the following are matter?
Rain Sunlight CloudsHeat Rocks AirSteam Radios Radiowaves
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What’s the difference between mass and weight?
• Mass is a measure of the amount of matter.
• Weight is more complicated. Weight depends on the amount of matter and on the gravitational pull exerted on the matter.
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What do chemists do?
• They figure out how things work
And
• They design materials with specific properties for specific applications.
Basic Research
Applied Research
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What materials in your life result from chemistry?
• Medicines• Plastics• Metals• Ceramics• Synthetic Fibers• Concrete• Abundant & Safe food supply
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What about energy?
• Fossil Fuels• Solar• Nuclear• Batteries
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What about the environment?
• Ozone Depletion• Global Warming• Acid Rain• Ground water contamination• Surface water contamination• Heat pollution
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What kinds of chemistry are there?
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What’s this?
http://www.utdallas.edu/~parr/chm1341/laltable.gif
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What are Elements?
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Elements are:
• Fundamental building blocks of nature.
• Different elements have different types of atoms.
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What are the parts of an atom?
Protons
Neutrons
Electrons
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How are atoms of different elements different?
•They have different numbers of protons.
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How many elements are there?
• About 115 elements.• Some are man-made.• 88 or 92 naturally occurring.*• (Some have v. short half-lives –
none around. 43, 61, 85, 87: no stable isotopes.) Some say only 43 & 61 not.
*Depends on how you count.
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What is the most abundant element in the universe?
• Hydrogen!
What is the most abundant element in the earth’s crust?
What is the most abundant element in the human body?
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What does it look like when you work as a chemist?
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http://www.chem.umu.se/dep/anachem/forskning/images/solutions.jpg
http://www.cod.edu/people/faculty/fullerd/Images/CHglass.GIF
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http://www.esp.edu/chemistry/reu/chemistry.with.a.purpose.jpg
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http://www.benfieldhrc.org/SiteRoot/activities/books/global_warming.jpgglobal warning
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http://www.imc.tuwien.ac.at/catalysis/jobs/nox_kreis.gif
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http://web.aces.uiuc.edu/aim/images/smog.jpg
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Travel?
http://news.uns.purdue.edu/UNS/images/shepson.arctic.jpeg http://www.env.leeds.ac.uk/resear
ch/ias/chemistry/images/plane.jpg
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http://laserweb.jpl.nasa.gov/images/planet_off.jpg
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http://www.ndeanalytical.com/FTIR.jpg
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http://www.udri.udayton.edu/NR/rdonlyres/3E0F9390-ECBE-49FE-A9BB-1BF1353388D7/0/varian.jpg
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http://images.google.com/imgres?imgurl=http://biochemistry.unh.edu/alumimages/DFCIPIC.jpg&imgrefurl=http://biochemistry.unh.edu/undergraduate/whatis.html&h=300&w=315&sz=50&tbnid=h_5iPmmsc-wJ:&tbnh=107&tbnw=112&start=84&prev=/images%3Fq%3Dbiochemistry%26start%3D80%26hl%3Den%26lr%3D%26ie%3DUTF-8%26sa%3DN
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http://www.unlv.edu/Colleges/Sciences/Chemistry/images/dennis.jpg
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http://www.emsl.pnl.gov/capabs/ri/lpas_fig1.jpg
http://jilawww.colorado.edu/~djn/index_files/slitdischarge_pix.jpg
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http://laser.physics.sunysb.edu/~amarch/annemarie.jpg
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http://www.engr.unl.edu/erc/images/compou~1.jpg
1 atm = 760 torr
1 X 10-10 torr
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28 Mn on Ag
http://www.ieap.uni-kiel.de/surface/ag-berndt/images/leer-sml.gif
http://www.bbc.co.uk/radio4/today/reports/archive/science_nature/images/ibm.jpg
http://www.rhk-tech.com/hall/images/feo.jpg
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http://www.fisica.uniroma2.it/infm/nanolab/HREELS1.jpg
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http://www.cm.utexas.edu/white/images/skunk_hreels.jpgHREELS 2
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Requirements for Medical School
• 1 year of biology• 1 year of calculus• 1 year of physics• 2 years of chemistry
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Requirements for Engineering
•Many engineering fields require at least 1 year of college chemistry
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Requirements for Art History/Art Restoration
• At least 1 year of college chemistry