Using the Periodic Table
Particles in a Solid, a Liquid and a Gas
Particles in a Solid, a LIquid and a Gas (unlabelled)
Robert Brown, 1827
In 1827, biologist Robert Brown was looking through a microscope, studying pollen grains in water.
He observed something amazing. The grains kept jiggling about, and never slowed down, even when he looked at them again much later.
This became known as Brownian motion.
But Brown himself couldn't work ...
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