Laboratory Experiment: Spectra of Salt Compounds Led by: Professor Cyril Giurgis

Firework Colorants Color Compound Red strontium salts, lithium salts lithium carbonate, Li2CO3 = red strontium carbonate, SrCO3 = bright red Orange calcium salts calcium chloride, CaCl2 calcium sulfate, CaSO4·xH2O, where x = 0,2,3,5 Gold incandescence of iron (with carbon), charcoal, or lampblack Yellow sodium compounds sodium nitrate, NaNO3 cryolite, Na3AlF6 Electric White white-hot metal, such as magnesium or aluminum barium oxide, BaO Green barium compounds + chlorine producer barium chloride, BaCl+ = bright green Blue copper compounds + chlorine producer copper acetoarsenite (Paris Green), Cu3As2O3Cu(C2H3O2)2 = blue copper (I) chloride, CuCl = turquoise blue Purple mixture of strontium (red) and copper (blue) compounds Silver burning aluminum, titanium, or magnesium powder or flakes

Expected Colors vs Actual Colors SrCl2 – red CaCl – orange NaCl- yellow CuCl2 – blue LiCl – whitish

Unique, Characteristic, Distinctive The important thing to know is that every atom of a particular element will have the same pattern of lines all the time. We say that the spectrum (colors given off) of an element is characteristic. Useful because you can identify unknown elements by comparing them to others spectra

Wave Scientists (Quantum Mechanics) How these various spectral bands form is a matter of extreme importance because they were among the first experimental proofs of quantum mechanics done by Erwin Schrödinger. First, because a light wave's frequency is proportional to its energy, (when one goes up the other goes up, when one goes down, the other goes down) he saw the different colored bands as representing discrete energy levels with nothing between them that 'nothing-between-them' is the basis of the notion of quantum mechanics - sort of like integers have no fractions between them

Websites to Help Answer The Conclusion Questions University of Manitoba atomic theory part two (you have to open the word document) http://www.bing.com/search?q=university+of+manitoba+atomic+theory+part+two&qs=n&form=QBRE&pq=university+of+manitoba+atomic+theory+part+two&sc=0-0&sp=-1&sk=&cvid=a0d02d30abf94c30a3d0285cfaa486fa http://www.science-projects.com/fes/FlameEmissions.htm http://www.wisegeek.com/what-is-an-emission-spectrum.htm

Missing Ionic Comics I have received Victor, Bacy, Cyril, Shirliz, Emily, Daniel (don’t forget), Owen (almost), Prasansa Rachel lElla Zoya, Josh A (almost – adding in nucleus details) Harleen - email I will be calling home for Falicity + Josh J