Chapter 21, Problem 21.59E

Interpretation Introduction

Interpretation:

The defect caused by the hydrogen molecules in the solid Pd metal is to be predicted. The reason as to why hydrogen is absorbed by Pd and no other gas is to be stated.

Concept introduction:

There are two types of defects possible when additional atom is present in the unit cell. When the additional atom squeezes itself between the normally occupied positions, the defect is known as the interstitial defect and when the additional atom substitutes an atom in the unit cell then it is known as the substitution defect.