The super-heavy element 117 ununseptium has been created in a German lab. It is the heaviest element to have ever been created. One atom of ununseptium outweighs an atom of lead by 40 percent.
The super-heavy element 117 ununseptium has been created in a German lab. It is the heaviest element to have ever been created. One atom of ununseptium outweighs an atom of lead by 40 percent.