Potassium is an "evil" element, but it's crucial to life. In this video see some violent explosions and the gentle creation of a potassium mirror. More chemistry at http://www.periodicvideos.com/Follow us on Facebook at http://www.facebook.com/periodicvideosAnd on Twitter at http://twitter.com/periodicvideosPeriodic Videos films are by video journalist Brady Haran
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