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The only incorrect statement for the packing of identical spheres in two dimension is:

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there is only one void per atom m both, square and hexagonal close packing

for hexagonal close packing, coordination number is 6.

for square close packing. coordination number is 4.

hexagonal close packing is more efficiently packed than square close packing.

answer is C.

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Detailed Solution

Coordinaation number in square closed paking =8

Coordination number in hexagonal close parking = 12.

There is more than one void per atom in both, square and hexagonal close packing

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