Question

Calculate the percentage efficiency of packing in case of simple cube cell.(With explanation and detailed answer)

Answer 1

In a simple cubic lattice the atoms are located only on the corners of the cube.

Let take edge length or side of the cube = a,

Let take radius of each particles               = r

The relation between radius and edge a

                 a     = 2r

The volume of the cubic unit cell             = side3

                                                                     = a3

                                                                     = (2r)3

                                                                     = 8r3

Number of atoms in unit cell  = 8 x 1 /8

                                                   = 1

The volume of the occupied space = (4/3)πr3

Answer 2

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