Traffic Lights - Periodic Table of Videos

The traffic light reaction sees a solution change colour from green to red to amber. More links in description below ↓↓↓ Support Periodic Videos on Patreon:   / periodicvideos   A video on every element: http://bit.ly/118elements More at http://www.periodicvideos.com/ Follow us on Facebook at   / periodicvideos   And on Twitter at   / periodicvideos   From the School of Chemistry at The University of Nottingham: http://bit.ly/NottChem Periodic Videos films are by video journalist Brady Haran: http://www.bradyharanblog.com Join Brady's mailing list for updates and extra stuff --- http://eepurl.com/YdjL9