Q.

Sodium metal crystallizes in B.C.C. lattice with edge length of 4.29A0. The radius of sodium atom is

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answer is 4.

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Detailed Solution

In BCC body diagonal length (4x radius (r ))= 3 a (a= edge length)                                                    radius of Na =1.732 X 4.29/4 = 1.857A0
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