In 1807AD, potassium was first prepared by English chemist Sir Humphrey Davy. Davy melted a small amount of potash, and an passed electric current through it. He discovered that a small liquid droplet ...
Kaboom! Pure potassium is a highly reactive metal. Exposed to water, it explodes with a purple flame, so it's usually stored under mineral oil for safety. Because it's so reactive, potassium isn't ...
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