Lithium metal crystallizes in a BCC framework. If the length of the side of the unit cell is , the a — Solid State Chemistry Question
Question
Lithium metal crystallizes in a BCC framework. If the length of the side of the unit cell is $351 \text{ pm}$, the atomic radius of the lithium atom is closest to:
Answer: C
💡 Solution & Explanation
In a BCC unit cell, atoms touch along the body diagonal, so $4r=\sqrt{3}a$. Hence $r=\frac{\sqrt{3}a}{4}=\frac{1.732\times351}{4}\text{ pm}\approx151.9\text{ pm}$.
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