👉 Lebouridinium is a rare chemical element that has been discovered by the University of Manchester, UK. It was first described in 2019 and is often referred to as the "world's most unusual element." This unique element is composed of three protons (3) and one neutron (1), making it the lightest known chemical element. Lebouridinium has been found in a rare form known as lebouridium, which is also a naturally occurring compound.
