Question: What Is the Densest Element?
Have you ever wondered which element has the highest density or mass per unit volume? Here's the answer.
Answer: Density is mass per unit volume. Either of two elements can be considered the element with the highest density: osmium or iridium. The density of the element depends on many factors, so there isn't a single number for density that would allow us to identify one element or the other as the most dense. Each of these elements weigh approximately twice as much as lead. The calculated density of osmium is 22.61 g/cm3 and the calculated density of iridium is 22.65 g/cm3, though the density of iridium has not been experimentally measured to exceed that of osmium.