Chemical reactions can be so fun. For example, Mg + HCl:
Sodium, potassium, rubidium, and caesium are known as Alkali metals. They can be found on the leftmost column of the Periodic Table. These elements are extremely reactive since they only have one electron to lose.
This is the reaction of rubidium, then caesium, in water:
If you have any other crazy chemical reactions, drop off a comment!