JEE Main Chemistry question

Chemistry The Solid State JEE Main

Not in JEE Main or NEET syllabus

Sodium metal crystallises at room temperature in a body centred cubic lattice with a cell edge Å. The radius of sodium atom is

(A)1.40 Å
(B)2.65 Å
(C)1.85 ÅCorrect
(D)2.15 Å

Answer: (C)

Solution

For a bcc lattice, atoms touch along the body diagonal, so , giving Å. This does not

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Question ID VK-141582