Chapter 1 The Solid State talks about two main categories of solids which are, Crystalline solids and amorphous solids. Before understanding the differences between these solids, let us learn their characteristic properties.
- They have a definite shape, volume, and mass
- Their constituent particles have fixed positions and can only oscillate about their mean positions
- Intermolecular distances are short
- They are incompressible and rigid
- Intermolecular forces are strong
Crystalline solids have definite geometrical shape and are true solids. These solids are anisotropic in nature and have long-range order.
- Ionic solids
- Molecular solids
- Covalent-network solids
- Metallic solids
Frequently asked Questions on CBSE Class 12 Chemistry Notes Chapter 1: The Solid State
What are ‘Crystalline solids’?
Crystalline solids are solids whose constituents are arranged in a highly ordered microscopic structure forming a crystal lattice.
What is a ‘Unit cell’?
A unit cell is the smallest portion of a crystal lattice that shows the three-dimensional pattern of the entire crystal.
What is ‘Packing Efficiency’?
The packing efficiency is the fraction of the crystal/unit cell actually occupied by the atoms.