Chapter 11, Problem 11.111CP

Interpretation Introduction

Interpretation:

The value of Avogadro number should be determined.

Concept introduction:

A unit cell is the smallest amount of 3-Dimensional piece of a solid comprising of basic particles of the solid in varied but generally common arrangements which when recurring over and again in dissimilar directions gives the complete solid crystal. There are numerous unit cells depending on the parameters, i.e. axial angles and axial length and second, on basis of location of constituent particles within the unit cell.

All unit cell is characterized in terms of lattice points--the points in space regarding which the particles are liberated to vibrate inside the crystal.

Face-centered cubic unit cell - It too begins with similar particles resting on the 8 corners of the cube. But this structure too contains the similar particles inside the centers of the 6 faces of the unit cell, for a sum of fourteen similar kind of lattice point.