1.
Mercury thiocyanate decomposition
4.
Hydrogel beads + colored water
7.
Iron + copper sulfate solution
9.
Chlorine tablet + rubbing alcohol in closed bottle
10.
Burning magnesium + water
12.
Blood in hydrogen peroxide
15.
Slow motion transformation of beta tin into alpha modification
16.
Sodium polyacrylate + water
17.
A drop of soap added to milk containing food coloring
18.
Radon 220 gas squirted into a cloud chamber
19.
A light bulb burning out
20.
Ferrofluid in a glass bottle
22.
"Elephant's toothpaste"