Chemistry studies the • Composition • Structure • Properties • Transformations of matter (What it’s made of) (How it’s arranged) (Characteristics) (Behavior)
What is Matter? • Anything that has mass & occupies space. Which of the following are matter? Rain Sunlight Clouds Heat Rocks Air Steam Radios Radiowaves
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.
What do chemists do? • They figure out how things work And • They design materials with specific properties for specific applications. Basic Research Applied Research
What materials in your life result from chemistry? • Medicines • Plastics • Metals • Ceramics • Synthetic Fibers • Concrete • Abundant & Safe food supply
What about energy? • Fossil Fuels • Solar • Nuclear • Batteries
What about the environment? • Ozone Depletion • Global Warming • Acid Rain • Ground water contamination • Surface water contamination • Heat pollution
What kinds of chemistry are there? Organic Environmental Atmospheric Inorganic Physical Surfaces Pharmaceutical Nuclear Analytical Biochemistry
http://www.utdallas.edu/~parr/chm1341/laltable.gif What’s this?
Elements are: • Fundamental building blocks of nature. • Different elements have different types of atoms.
What are the parts of an atom? Protons Neutrons Electrons
How are atoms of different elements different? • They have different numbers of protons.
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.
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?
http://www.benfieldhrc.org/SiteRoot/activities/books/global_warming.jpghttp://www.benfieldhrc.org/SiteRoot/activities/books/global_warming.jpg global warning
Travel? http://news.uns.purdue.edu/UNS/images/shepson.arctic.jpeg http://www.env.leeds.ac.uk/research/ias/chemistry/images/plane.jpg
1 atm = 760 torr 1 X 10-10 torr http://www.engr.unl.edu/erc/images/compou~1.jpg
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
Requirements for Medical School • 1 year of biology • 1 year of calculus • 1 year of physics • 2 years of chemistry
Requirements for Engineering • Many engineering fields require at least 1 year of college chemistry
Requirements for Art History/Art Restoration • At least 1 year of college chemistry