Question

Argon crystallises in fcc arrangement and the density of solid and liquid Ar is 1.59 g/cm\(^3\) and 1.42 g/cm\(^3\), respectively. The percentage of empty space in liquid Ar is

• A. 34.84\%
• B. 43.8\%
• C. 23.4\%
• D. 21.6\%

Hint:

The fcc structure has a packing efficiency of approximately 74%, meaning 26% of the space is empty.

Answer 1

The Correct Option is A

The percentage of empty space can be calculated by comparing the densities of solid and liquid argon. Using the formula for density and understanding the structure of fcc, the empty space is found to be 34.84\%.