Question

An elemental crystal has a density of \(8570\,\text{kg m}^{-3}\). The packing efficiency is 0.68. The closest distance of approach between neighbouring atoms is \(2.86\,\text{\AA}\). What is the mass of one atom approximately?

• A. \(93\,\text{amu}\)
• B. \(39\,\text{amu}\)
• C. \(63\,\text{amu}\)
• D. \(29\,\text{amu}\)

Hint:

FCC crystals have packing efficiency of about 0.68.

Answer 1

The Correct Option is C