Selenium is element number 34. More links in description below ↓↓↓ Support Periodic Videos on Patreon: https://www.patreon.com/periodicvideos A video on every element: http://bit.ly/118ele...
========== Selenium. So selenium is an element that’s quite like
sulphur. But, sulphur has its common form in S8 rings whereas selenium exists
in its more common form as long chains of selenium atoms and
if you shine light on these chains they start conducting electricity.
So selenium was the material that was used in the early photo cells for
things like burglar alarms and doors that open themselves and so on. So here is a sample of selenium and we’re
going to unpack it from the box here. And it’s in the form of a shot. Selenium has a number of other applications
and perhaps the one that amuses me most is that it’s used in shampoos.
Some people, as you know, get dandruff which is caused by bacteria
on their scalp and if you use a compound which is a ri...