Super Expensive Metals - Periodic Table of Videos

Are they really worried that The Professor is going to rob the place that they had to strip him and even take away his belt?

Rhodium, iridium, palladium, and platinum are impressively un-reactive, noble metals.

In the video today we get to see these catalytically useful metals being processed from sponge (what I would think of as ore).

I love seeing what I think of as a crude process like forging being used to reshape the incredibly expensive ingots.

And I doubt these are the absolutely most expensive metals out there - I'd put the sodium from previous videos up there - but it is a chance to answer a question I get from students from time to time: "what is the most expensive element?"