From Periodic Videos. The Professor answers more viewer questions – with topics including elements (of course), dreaming, and hair shampoo. More links and info in full description ↓↓↓ Support us on Patreon: https://www.patreon.com/periodicvideos Our table of Patrons: http://periodicvideos.com/patreon_table/table.jpg Videos on all 118 elements: http://bit.ly/118elements Some previous videos from this Q and A (more soon, especially…