Solid State
Classification of solids, unit cells, packing efficiency, point defects, electrical / magnetic properties.
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Take a full mock →Q1 · Solid State · EASY
In a face-centred cubic (fcc) unit cell, atoms are located at all corner positions and at the centre of each face. How many atoms in total belong to one unit cell of an fcc structure?
Q2 · Solid State · MEDIUM
A metal crystallises in a body-centred cubic (bcc) structure. If the edge length of the unit cell is 'a', what is the radius 'r' of the metal atom in terms of 'a'?
Q3 · Solid State · MEDIUM
The packing efficiency of a simple cubic unit cell is approximately 52%. What is the approximate packing efficiency of a face-centred cubic (fcc) unit cell?
Q4 · Solid State · HARD
A compound AB has a rock salt structure (fcc lattice of A with B occupying all octahedral voids). If the edge length of the unit cell is 500 pm and the density of the compound is 4.0 g/cm³, what is the molar mass of AB? (Avogadro number = 6 × 10²³ mol⁻¹)
Q5 · Solid State · EASY
In a face-centered cubic (FCC) unit cell, the number of atoms per unit cell is: