Question

Explain how much portion of an atom located at (i) corner and (ii) body-centre of a cubic unit cell is part of its neighbouring unit cell.

Answer 1

1)1/8th and (2) 100/100 part of it

Answer 2

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(i)the atom of corner of a cubic unit cell is shared by eight adjacent unit cells.

Therefore, portion of the atom at the corner = 8 × 1/8 = 1 atom.

(ii) The atoms present at the center of the body is not shared by its neighboring unit cell.

Therefore, portion of the atom at the center = 1 atom

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