Non-Crystalline Solid

Glass is a non-crystalline solid. It is also known as amorphous solid.

Amorphous and Crystalline Solids

Amorphous and crystalline solids are two categories of solids based on their atomic arrangement.

Crystalline Solids

Crystalline solids have a regular and repeating atomic arrangement. They have well-defined faces, edges, and angles. The atoms, molecules, or ions in crystalline solids are arranged in a three-dimensional pattern. Examples of crystalline solids are CsCl, NaCl, and CaF2.

Non-Crystalline Solids

Non-crystalline solids, also known as amorphous solids, do not have a regular and repeating atomic arrangement. The atoms, molecules, or ions in amorphous solids are arranged in a random pattern. Examples of amorphous solids are glass and rubber.

Classification of Solids

Solids can be classified based on their structure, bonding, and properties. Some common classifications of solids are:

1. Crystalline Solids: These solids have a regular and repeating atomic arrangement.

2. Non-Crystalline Solids: These solids do not have a regular and repeating atomic arrangement.

3. Ionic Solids: These solids are made up of ions held together by electrostatic forces.

4. Molecular Solids: These solids are made up of molecules held together by intermolecular forces.

5. Metallic Solids: These solids are made up of metallic atoms held together by metallic bonding.

6. Covalent Solids: These solids are made up of atoms held together by covalent bonding.

Conclusion

In conclusion, glass is a non-crystalline solid, which means it does not have a regular and repeating atomic arrangement. Crystalline solids, on the other hand, have a regular and repeating atomic arrangement. Solids can be classified based on their structure, bonding, and properties.