Cesium - One of the Most Active Metals on Earth!

Shelby Rogers

YouTuber Thoisoi might've conducted his craziest and most dangerous experiment to date.

He took highly-flammable cesium and experimented with it for the sake of his channel and our entertainment.

Cesium is so reactive that it spontaneously ignites in air below 130 degrees Fahrenheit. Cesium is also very expensive, more expensive than gold. at 139.50 Euro / gram. The 50 gram vials Thoisoi used for his experiments? Roughly $2,500 USD each.