16 Questions
What is the equation called when X-rays are diffracted by a crystal plane?
Bragg’s equation
What does the variable 'n' represent in Bragg’s equation?
The diffraction order
What does 'd' represent in Bragg’s equation?
Distance between atomic planes
What is the smallest geometrical portion of a crystal lattice called?
Unit cell
What is the coordination number of atoms in a primitive cubic unit cell?
6
What is the coordination number of atoms in a face centred cubic unit cell?
12
What is the coordination number of atoms in a body centred cubic unit cell?
8
What is the packing fraction of a primitive cubic unit cell?
52.4% or 0.524
What is the packing fraction of a face centred cubic unit cell?
74% or 0.74
What is the packing fraction of a body centred cubic unit cell?
68% or 0.68
What are the characteristics of solids?
Defined shape and volume, rigidity, high density, low compressibility
What are the two types of solids?
Crystalline solids and amorphous solids
How do crystalline solids differ from amorphous solids?
Crystalline solids have a definite and regular arrangement of constituent particles, while amorphous solids do not have any regular arrangement.
What are the properties of crystalline solids?
Long order arrangement of particles, anisotropic nature, sharp melting points
How do amorphous solids differ from crystalline solids in terms of cleavage?
Amorphous solids undergo irregular cleavage when cut, while crystalline solids undergo clean cleavage.
What are the physical properties of amorphous solids?
Isotropic in nature, melt over a range of temperature
Explore the characteristics and types of solids in the context of chemistry class 12, chapter 1. Learn about crystalline solids, amorphous solids, and their distinctions.
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