A few videos I've uploaded this week involve that most captivating of elements - gold.
First there was the famous gold foil experiment which Ernest Rutherford used to discover the atomic nucleus.
Essentially he used a radioactive source to fire alpha particles through a thin gold foil.
The fact so few of them were deflected helped him deduce that the atom most mostly empty space.
I filmed a re-creation of the experiment for Backstage Science.
Secondly was a video about a gold nanoparticle for Sixty Symbols.
The video includes some nice footage zooming in on the particle with a transmission electron microscope, so I posted that raw footage to Test Tube.
So that's it for this week's videos, but here are some videos about gold that I've posted over the past year or two!!!
They're all from The Periodic Table of Videos.