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प्रश्न
Explain with diagram, the vacancy defect.
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उत्तर
- During the crystallization of a solid, a particle is missing from its regular site in the crystal lattice.
- The missing particle creates a vacancy in the lattice structure. Thus, some of the lattice sites are vacant because of missing particles as shown in the figure. Such a crystal is said to have a vacancy defect.
- The vacancy defect can also be developed when the substance is heated.
- Due to the absence of particles, the mass of the substance decreases. However, the volume remains unchanged. As a result, the density of the substance decreases.
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