Boeing
The chemical lightest metal are Lithium (density of 0.534 g/cm3), Potassium (density 0.862 g/cc), and Sodium (density 0.971 g/cc) are all alkali metals.
The chemical lightest metal are Lithium (density of 0.534 g/cm3), Potassium (density 0.862 g/cc), and Sodium (density 0.971 g/cc) are all alkali metals.