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PS.121 Links
» §1 Syllabus » §3 Syllabus - - - - » Unit 1 » Unit 2 (here!) => » Unit 3 - - -Pearson- - -
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Physical Science For Teachers - Chemistry (PS.121) - Course Home Page
My office: Science 159 (below ramp to 3rd Ave) my e-mail : foltzc@marshall.edu don't phone - stop in! Web-Works are due Wed.Oct.18Plan for Quiz 4 to be Thurs.Oct.19 Plan for Exam 2 to be
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| week of | Tuesday | Thursday |
| Sep.26 | atomic theory: Democritus, Davy, Dalton
pattern-finding: Dobereiner, Newlands, Mendeleev nucleus inside, electrons outside: Rutherford, Bohr, Pauli proton repulsion => small nuclei "padded" with N ~ Z neutrons isotope notation: mass#charge#Name(ion) electric PE long-range => "many Z" nuclei need neutron excess (see isotope chart ) |
nuclear reactions for alpha ( 42α ) decay , beta ( 0−1β ) decay , positron ( 0+1e+ ) decay
neutron stack => β decay routinely followed by gamma decay fake "half-life" for pennies , or pretend "half-life" for dice 137Cs cow → 137Ba* , milked for gamma decay : extract half-life from data radioactive dating examples reactions for nuclear Energy (fission/fusion) ; activation conditions |
| Oct.03 | numbered electron clouds => electron energy levels (shells)
. . . fill from bottom up => periodic table rows orbital subshells [blocks] fill "lower angular momentum" first . . . (see drawing for Na) => column groups (see table) periodic trends ( see table ) => electronegativity trends (see table ) electrons excited into higher-energy shells => light spectra from atoms |
isotope fraction => non-integer element (atomic) masses
mass for a mole of sample atoms ... 2-isotope examples sorting pennies by weight (activity) => average penny-mass in sample + ions attract − ions => neutral molecule Dalton's integers => how many atoms to satisfy a molecule |
| Oct.10 | Quiz 3
molecular mass (formula mass) for An Bm Δen < 1.5 => co-valent bonds share valence electrons Lewis Dot diagrams for covalent hydrides Lewis dot diagrams for "octet" atoms "non-polar" bonds |
mass/mole for complicated molecules
Lewis dot diagrams for "compound ions" atoms with multiple valence options "oxidation" (raising) and "reduction" (lowering) of valence old-fashioned name endings oxidizers (-ing agents) & reducers (-ing agents) |
| Oct.17 | sugar & sand mixture, % by volume (activity)
: concentration % by mass computation : concentration % by moles calculation solute dissolves in solvent ... until satutared ionic solute dissolves in polar solvent => electric current conduction w/ table salt (NaCl) (activity) |
Quiz 4
"solubility rules" table (polar solute dissolves in polar solvent) saturating a solution (activity) calculating grams solute per Liter solution molarity: g/L ÷ grams/mole => mole/Liter => boiling-point elevation attempt (activity) |
| Oct.24 | dilutions using molarity
non-polar solute insoluble in polar solvent hydrocarbon dissolves hydrocarbon ... "water-insoluble" glue (activity) soap and detergent ... polar head, hydrocarbon tail precipitates forming crystals | :
: Unit 2 Exam : : |
| Oct.31 | :
begin Unit 3 : Chemical Reactions : |
reaction types
: reaction balancing : reaction energy |
| maintained by Curt Foltz - email comments to foltzc@marshall.edu
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