Question

Sodium metal crystallizes in a body cubic lattice with a unit cell edge of 4 The radius of sodium atom is approximate?

• A. 1.732 $\dot{A}$
• B. 3.22 $\dot{A}$
• C. 5.72 $\dot{A}$
• D. 0.93 $\dot{A}$

Answer 1

The correct option is A 1.732 $\dot{A}$

For bcc lattice, (radius), $r=\frac{\surd 3a}{4}$

Solution

∴ $r=\surd 3\times \frac{4}{4}=1.73\times \frac{4}{4}=1.73A^o$