Question

the number of atoms or moleules contained in one body centered cubic unit cell and in one face centered cubic unit cell is​

Answer 1

Total number of effective atoms in body centred cubic

= 8×1/8 + 1 = 1+1 = 2 atoms

One atom in the corner is shared by 8 other unit cells and there are 8 corners and 1 atom in the body centred is shared by only one unit cell

Total number of effective atoms in face centred cubic

= 8×1/8 + 6×1/2 = 1+3 = 4 atoms

8 atoms in corner and one atom on each face of shared by 2 unit cells

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