Sylvain Neuvel's book "Sleeping Giants" mentioned that the giant figure that's central to the book was made partly of iridium - "which weighs twice as much as lead." I tend to think of lead as being really heavy, and didn't realize we had a regular, stable element that weighed twice as much. Which got me curious about the relative weights of the metals. The water and the woods are there as comparators: I worked with wood years ago so I'm familiar, and we all know they float in water. This is a selective list: sorry, it wasn't my intent to list "all metals." It's no accident that water is "1": it's part of the design of the Metric System.
|Material||Density (g/cm3) at room temp.|
Most data from Wikipedia, Maple from here.
Fascinating to think that all the metals above Mercury in the table would float it it at room temperature ...