Which of the following shows maximum packing efficiency?a)Hexagonal close packingb)Body centred cubic unit cellc)Same in alld)Simple cubic unit cellCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

Hexagonal close packing (HCP) shows maximum packing efficiency among the given options.

Explanation:

Packing efficiency is the ratio of the volume of atoms in a unit cell to the volume of the unit cell. It indicates how closely the atoms are packed in a crystal lattice.

a) Hexagonal close packing (HCP):
In HCP, the atoms are arranged in a closely packed hexagonal pattern. The unit cell consists of two layers of atoms arranged in a hexagonal pattern with the third layer placed in the depressions between the first two layers. The third layer is placed in such a way that it aligns with the first layer, forming a close-packed structure. The packing efficiency of HCP is 74.05%.

b) Body centred cubic unit cell (BCC):
In BCC, the atoms are arranged in a cubic lattice with one atom at each corner and one atom at the centre of the cube. The packing efficiency of BCC is 68%.

c) Simple cubic unit cell (SC):
In SC, the atoms are arranged in a cubic lattice with one atom at each corner of the cube. The packing efficiency of SC is 52.4%.

Therefore, among the given options, HCP has the highest packing efficiency.

Answer

The ans is A) Hexagonal closed pack It is 74% b)BCC has PE=68% d)SC has PE=52%Hope u get it...😄😄😄

Answer

Yaaaa because vacant space is lessser in hcp lattices than the other .i e more no of particles occupy the vacant and we know that p efficieny is the percentage of total occupied space by the parcticles. ok if u have any doubt then follow

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