Question

A given metal crystallizes out with a cubic structure having edge length of 361 pm. If there are four metal aotms in one unit cell, what is the radius of one atom?

• A. 80 pm
• B. 108 pm
• C. 40 pm
• D. 127 pm

Answer 1

Answer: (D)

127 pm

Answer 2

${FCC : r = \frac{a}{2 \sqrt{2}} = \frac{361}{2 \times 1.4141} = 127 \, pm }$