Just a couple of vids on basic matters of atoms.
How the heck do we know they’re there? Well, in the olden days it was down to Brownian motion – but nowadays, we got better stuff in our tool sheds.
As always, great thanks to the authors of these vids: this web site owns nothing and claims no credit.
Gopnik on BrowNIAn motion. Iiiit’s BORIS!
Have YOU ever seen an atom?
How small is an atom?
The fourth state of matter
States of matter updated 🙂