This scatter plot compares speed of sound through solid elements against their density. The relationship reveals how atomic bonding affects wave propagation.

The fastest sound speeds occur in light, stiff materials: beryllium leads due to its strong covalent bonding and low mass. Dense metals like lead and gold have slow sound speeds despite their mass - their relatively weak metallic bonds don't transmit vibrations efficiently. This relationship matters for ultrasonic applications and understanding material stiffness.