“science cannot be stopped. man will gather knowledge no matter what the consequences – and we cannot predict what they will be.”
__ Linus Pauling
spagna is now on remind.com!
check here for important class updates and news!
click the links below for each courses individual homepage:
UPDATE: now offering tutorials for your chem. problem-solving needs! see below…
(tutorials are uploaded as QuickTime files; try refreshing if it does not load on the first try)
click here for a .pdf periodic table
click here for a .pdf common ion chart
click here for lab experiments
you will never know what you can do until you try.
large hadron collider (LHC) @ CERN facility; geneva, switzerland biosynthesis of ‘longifolene’ from 'farnesyl diphosphate’
check out the disappearing gallium spoon below! gallium is a metal that has a low melting point (86oF, 30oC). the metal has applications in electronics, such as microwave circuits and light-emitting diodes (LEDs).
here is a tutorial on calculating percent abundances for the different isotopes of an element. this particular example concerns 85Rb and 87Rb, two isotopes of rubidium.
check out this video demonstrating a nuclear fission (atom splitting) reaction! it begins slowly at first and then spirals out of control as more and more energy are released…
here is a tutorial on radioactivity, radioactive decay, half-life, and using the half-life equation. enjoy!
i was asked a question one day about how the speed of light was measured. i know that it is about 3.00 x 108 m/s, but i had to admit i had no idea about where that number came from. here is a video from BBC where someone much smarter that i explains the basics with a pleasing accent . . . check it out!
below, a short video explains how to easily calculate the mass defect and nuclear binding energy for an isotope of an element. both fun to watch, fun to do . . . check it out!
above is a ‘density column’ made in one of my classes… with the exception of the oil and water, all of the liquids are perfectly capable of mixing, yet will float one on top of another if layered slowly. the column is constructed in order of decreasing density.
above is a demonstration known as the ‘pharoh’s snake’ where mercury (II) thiocyanate decomposes as it is heated. the result is a large’snake-like’ mass that appears to come from nowhere… enjoy!