Sodium metal crystallizes in B.C.C. lattice with edge length of \( 4.29 \mathrm{~A} \). The radius of sodium…

Sodium metal crystallizes in B.C.C. lattice with edge length of \( 4.29 \mathrm{~A} \). The radius of sodium
atom is
  1. \( 2.857 \dot{A} \)
  2. \( 1.601 Å \)
  3. \( 2.145 Å \)
  4. \( 1.857 \dot{A} \)

Solution

Edge length $(a)=4.29 Å$ for bcc, $r=\frac{\sqrt{3}}{4} a$ $=\frac{\sqrt{3}}{4} \times 4.29$ $=1.857 Å$

Asked in: TEST SERIES MHT-CET Full Test 6

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