Define the following: brittleness, ductility, hardness, elasticity, malleability.

- Brittleness: Brittleness is the tendency of a material to fracture or break when subjected to stress, without significant deformation. Brittle materials do not exhibit plastic deformation before breaking.

- Ductility: Ductility is the ability of a material to deform under tensile stress, such as stretching or bending, without breaking. Ductile materials can be drawn into wires or hammered into thin sheets without fracturing.

- Hardness: Hardness is a measure of a material's resistance to deformation, scratching, or abrasion. It is typically measured using the Mohs scale or the Rockwell scale, with higher values indicating greater hardness.

- Elasticity: Elasticity is the ability of a material to return to its original shape after being deformed by an external force. Elastic materials can be stretched or compressed and will return to their original shape once the force is removed.

- Malleability: Malleability is the ability of a material to be hammered, rolled, or pressed into thin sheets or shapes without breaking. Malleable materials can undergo plastic deformation without fracturing.

Brittleness: The tendency of a material to fracture without significant deformation under load. Brittle materials are stiff and have little resilience.

Ductility: The ability of a material to deform plastically and sustain significant elongation before fracture. Ductile materials are flexible and can be bent or drawn into wires.

Hardness: The resistance of a material to permanent deformation under load. Harder materials are more scratch-resistant and difficult to penetrate.

Elasticity: The ability of a material to return to its original shape and size after the removal of an applied force. Elastic materials are resilient and can absorb energy.

Malleability: The ability of a material to be hammered or rolled into thin sheets without cracking or tearing. Malleable materials are soft and easily deformed.

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