Question:medium

Sodium metal crystallises in a body centred cubic lattice with edge length of x Å. If the radius of sodium atom is 1.86 Å, the value of x is

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Memorize the relationship between edge length (a) and atomic radius (r) for the main cubic lattices: - Simple Cubic (SC): \(a = 2r\) (atoms touch along the edge) - Body-Centered Cubic (BCC): \(a\sqrt{3} = 4r\) (atoms touch along the body diagonal) - Face-Centered Cubic (FCC): \(a\sqrt{2} = 4r\) (atoms touch along the face diagonal)

Updated On: Mar 30, 2026

4.29
3.29
2.39
3.93

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The Correct Option is A

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