What is meant by “brittleness”? Which type of elements usually show brittleness: metals or non-metals?

Brittleness refers to the tendency of a material to break or shatter easily under stress without significant deformation. When a brittle material is subjected to force, it tends to fracture rather than bend or stretch.

Characteristics of Brittle Materials

Brittle materials often exhibit the following traits:

• Low tensile strength
• Little to no plastic deformation before breaking
• Fracture occurs suddenly and without warning

Elements and Their Brittleness

In terms of elements, non-metals typically display brittleness. Examples include:

• Carbon (in the form of graphite)
• Phosphorus
• Sulfur

On the other hand, metals are generally more ductile, meaning they can be stretched or shaped without breaking. However, some metals can also be brittle under certain conditions, especially when they are cold or have impurities.

Summary

To sum up, brittleness is a property that leads to sudden failure in materials, primarily seen in non-metals, while metals usually exhibit more flexibility.