How things work college course/Hunting the Elements (PBS NOVA)

Will do this after the quizzes for Fall 2015 have been completed.

Gold

 * 1) {Au is the symbol for}
 * 2) {All the gold ever mined would fit into a single cube of about}
 * 3) {Gold is quite common in the Earth’s crust, but is difficult to mine because it is locked up in granite.}
 * 4) {Although modern assaying methods yield more precise estimates, it is usually possible to estimate the quality of ore by counting the density of yellow specks in dirt from ore. }
 * 5) {It is unusual to see the gold in gold ore with the naked eye}
 * 6) {To assay gold ore is to }determine the quality of gold ore.  purify it after it has been  mined
 * 7) {In ‘Hunting the Elements’, the gold ore from the Cortex mine is first crushed to the consistency of …Gravel  sand baby power
 * 8) {The fire assay process is - years old}  500
 * 9) {What fraction by weight of typical gold ore contains actual gold} answer: 32,000 or equivalently 25 pounds per 400 tons
 * 10) {About ____ % of the elements are metals} 75%
 * 11) { How an atom reacts chemically depends on how willing it is to share electrons with others } true
 * 12) { So do other so-called "noble" metals: silver, platinum, palladium,
 * 13) { Using cyanide to react with the gold allows them }
 * 14) { with a white powder called flux, chemicals that prevent the molten gold from reacting with or sticking to anything }

Copper

 * 1) { The ancients first learned how to heat rocks to extract copper, at least 7,000 years ago.}
 * 2) future's market
 * 3) Cu is coper
 * 4) malleable
 * 5) scares away bacteria
 * 6) Tin is Sn
 * 7) Tin plus copper is bronze
 * 8) {When ‘Hunting the Elements’ visited the Verdin Company, they  began the process with a bell, not of ______, but of ______.  This bell was used to make a mould  of    }
 * 9) { first manmade metal .alloy was bronze }
 * 10) {Which was first used, copper or bronze? }
 * 11) {Copper is soft and easy to dent because ..The rows of atoms can easily slide past each other }
 * 12) {What makes a metal conduct electricity?}
 * 13) define ingot
 * 14) An alloy of copper is made hard by the fact that the added atoms are …larger
 * 15) In ‘Hunting the Elements’ it is speculated that the libergy bell cracked because of too many atoms other than coppermpurites
 * 16) When the molten bronze is poured, what is done to prevent flaws from developing? (pour fast)
 * 17) 20-30% of molds fail

electron microscope

 * 1) Boundaries between grains are actually defects in the orderly arrangement of the atoms. --Crystallite.jpg
 * 2) In ‘Hunting the Elements’, Why would an electron microscope be covered on blankets
 * 3) In ‘Hunting the Elements’, what could the electron microscope see? Atoms could be seen but not distinguished. (true, distractros include Innelectronsr and outer shell

Atoms and the periodic table

 * 1) Scale the atom to the size of the nucleous: 10,000 to one
 * 2)  Scale the atom to the size of the nucleous: 2 miles (3 km) to 3 cm