COMEDK · Chemistry · 16. Solid State
Sodium metal crystallises in a body centred cubic lattice with a unit cell edge of \(4.29 Å\). The radius of sodium atom is
- A \(1.86 Å\)
- B \(3.22 Å\)
- C \(5.72 Å\)
- D \(0.93 Å\)
Answer & Solution
Correct Answer
(A) \(1.86 Å\)
Step-by-step Solution
Detailed explanation
For a body-centred cubic (BCC) lattice, the relationship between the unit cell edge length \(a\) and the atomic radius \(r\) is given by the formula: \(\sqrt{3}a = 4r\) Given the unit cell edge length \(a = 4.29 \text{ Å}\), we substitute this value into the formula:…
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