HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistrySolid stateAchiever Section
Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 Å. The radius of sodium atom is approximately:
A.5.72 Å
B.0.93 Å
C.1.86 Å✓ Correct
D.3.22 Å
Explanation
In the BCC structure the radius of sodium atom is 0 3 3 4.29A 4 4 r a x 0 =1.86A . Hence the correct answer is option (c)
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