NaK - the alloy of Sodium and Potassium - is notorious among chemists. But it can be pumped in an ingenious way. Featuring Professors Steve Howdle and Martyn Poliakoff. Sodium slow motion: https://www.youtube.com/watch?v=mzEOL-N2cbw All the elements in order: http://bit.ly/118elements 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 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.bradyharan.com/ Brady's Blog: http://www.bradyharanblog.com Join Brady's mailing list for updates and extra stuff --- http://eepurl.com/YdjL9