What is the heaviest substance/material that is known to man….?
Element 118 is the heaviest element ever seen in a laboratory, a dab of matter that lasted for less than one-thousandth of a second but would add an entry at the farthest reaches of the periodic table. By convention, the substance remains the Baby Doe of elements until its existence is confirmed at other laboratories. For now, the new substance will be principally known as element 118 for the number of protons in its nucleus, more than in any other element occurring naturally or produced in the laboratory.
