Question

What is the mass of an fcc unit cell if mass of one atom of an element is 6 × 10^-23 g?

Options

• 4 × 10^-23 g

• 24 × 10^-22 g

• 2.4 × 10^-23 g

• 2.4 × 10^-22 g

Answer 1

2.4 × 10^-22 g

Explanation:

In FCC, No. of atoms per unit cell = 4

Mass of unit cell = Mass of 4 atoms

= 4 × 6 × 10^-23 g

= 24 × 10^-23 g

= 2.4 × 10^-23 g