Classification of solids; crystalline state; seven crystal systems with cell parameters; close packed structures (cubic and hexagonal); packing in fcc, bcc and hcp lattices; nearest neighbours; ionic radii and radius ratio; point defects.
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Q1 · Solid State · EASY
In a face-centered cubic (FCC) unit cell, the number of atoms per unit cell is:
Q2 · Solid State · MEDIUM
A metal crystallizes in a body-centered cubic (bcc) lattice with edge length 3.16 Å. If the atomic radius is r, what is the packing efficiency (%) of this structure?