Mercuryball is the 80th element on the periodic table. It's one of the two liquid elements, the other being Bromine. Mercury is also very toxic. Many years ago, it was believed that their fumes were healthy and they were used in healing, but its fumes actually are very bad for organisms. It was also used in 18-hundreds when making hats, and caused Mad Hatter Syndrome which is where the phrase "Mad as a hatt”r" comes from.