Brittle substances are generally hard, while flexible substances are much softer.
What metal may be made either flexible or brittle?
Steel, when heated and cooled slowly, becomes flexible, but when cooled quickly, it becomes brittle.
For what is brittle steel used?
It is used for making knives, razors, axes, and other cutting instruments.
What may be done with metals that are flexible?
They may be hammered into thin plates.
What is this property in metals called?
It is called Malleability.
Which is the most malleable of all metals?