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An Intiative by Sri Chaitanya
a
the number of the nearest neighbours of an atom present in the topmost layer is 12.
b
the efficiency of atom packing is 74%.
c
the number of octahedral and tetrahedral voids per atom are 1 and 2, respectively.
d
the unit cell edge length is 22 times the radius of the atom.
answer is B.
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