00456nam a2200085Ia 4500008004100000245002800041300022900069650001300298856005900311170517s9999    xx            000 0 und d  aCrash Course: Chemistry  aHank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles - the proton, neutron and electron - come together...  xScience.  uhttp://topdocumentaryfilms.com/crash-course-chemistry/