Lithium has body-centered cubic structure and has a density of 0.534 g/mL which is much less than water. This means that it should float on water which has a density of approximately 1 g/mL at room temperature. Calculate the density of Li if the structure was a cubic close-packed structure and identify if it would still float on water.

• A. 0.580 g/mL, it will still float
• B. 0.753 g/mL, it will still float
• C. 0.893 g/mL, it will not float
• D. 1.21 g/mL, it will not float

Answer: (A)