The Density of Materials

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.

MaterialDensity (g/cm3) at room temp.
Balsa wood0.04-0.34
Lithium0.534
Maple wood0.6-0.75
Water1
Aluminum2.70
Iron7.87
Copper8.96
Silver10.49
Lead11.34
Mercury13.53
Uranium19.1
Gold19.30
Platinum21.45
Iridium22.56
Osmium22.59

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 ...