Question

Sodium crystallizes in bee structure with radius 1.86 × 10^-8 cm. Calculate the edge length of unit cell.

Options

• 6.20 × 10^-8 cm

• 4.29 × 10^-8 cm

• 3.72 × 10^-8 cm

• 8.05 × 10^-8 cm

Answer 1

4.29 × 10^-8 cm

Explanation:

For bee unit cell, r = `(sqrt3 "a")/4`

∴ a = `"4r"/sqrt3 = (4 xx 1.86 xx 10^-8 "cm")/1.732` = 4.29 × 10^-8 cm