In preparation for the 2012 Christmas Lectures Dr Peter Wothers heads off to the University of Leicester to conduct an extraordinary experiment reacting the most reactive metal in the periodic table (Caesium) with the most reactive nonmetal (Fluorine).

Due to the extreme reactivity of the two elements, Fluorine expert Professor Eric Hope is on hand to enable the experiment to be conducted safely.

We believe this is the first time the reaction has been caught on camera.

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