You can support us on Patreon: https://www.patreon.com/periodicvideos See also Brady's Objectivity series: http://bit.ly/Objectivity (science treasures) Responding to another viewer question, some team members recall the most dangerous chemical they have handled. More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideos Periodic Videos films are by video journalist Brady Haran