Question

1.
Give an example of a metal which
(I) is a liquid at room temperature.
(ii) can be easily cut with a knife.
(ii) is the best conductor of heat.
(iv) is a poor conductor of heat.

2.Explain the meanings of malleable and ductile.​

Answer 1

1) ii is the answer

2)

Malleability and ductility are related. A malleable material is one in which a thin sheet can be easily formed by hammering or rolling. In other words, the material has the ability to deform under compressive stress.

Malleability: Metal hammered into thin sheets, shows hammer hitting gold to make thin circle

A malleable material is one in which a thin sheet can be easily formed by hammering. Gold is the most malleable metal.

Credit: Buzzle

In contrast, ductility is the ability of a solid material to deform under tensile stress. Practically, a ductile material is a material that can easily be stretched into a wire when pulled as shown in the figure below. Recall pulling is applying tensile stress.

Ductility text showing the starting point, ductility, (how far it can stretch) and the end point, very tapered in the middle.

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Answer 2

ANSWER:

1. Mercury
2. Manganese
3. Iron
4. Bromine

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