What is the heaviest metal?

I assume by "heaviest," you mean "densest;" in that case, the densest chemical element is osmium (which is a metal). Osmium has a density of around 22 grams per cubic centimeter, about twice the density of lead! Answer 3: The heaviest naturally occurring element is plutonium measured by the mass of the element. read more

Question Date: 2011-11-18: Answer 1: Osmium is the most dense metal! Many people are familiar with lead (11.3 kg/L), but osmium is twice as dense (22.6 kg/L)! Each liter (about 1/4 gallon) of osmium weighs 22.6 kg (50 lbs). For comparison, each liter of water weighs only 1 kg (~2.2 lbs). read more

It's the heaviest element ever created, with an atom of ununseptium outweighing an atom of lead by 40 percent. Make some room on your periodic table, there's a new metal in town. Seventy-two scientists and engineers from 16 institutions around the world collaborated to confirm element 117's existence. read more

It's the heaviest element ever created, with an atom of ununseptium outweighing an atom of lead by 40 percent. Make some room on your periodic table, there's a new metal in town. An international team of researchers has just published a paper confirming the existence of element number 117—ununseptium. read more