Swapnali was observing the appearance of copper, silver, stone and brass. Which of these materials will appear different from the others? Give reason for your answer.
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Metals can be elements or alloys. Elements are the basic building blocks of chemistry. Examples of elements: Oxygen, nitrogen, hydrogen, iron (Fe), copper (Cu) and niobium (Nb).
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Stone will appear different from the rest.
- Copper and silver are pure metals. Brass is an alloy that is it is a mixture of two or more metals.
- Metals are lustrous. They are shiny in appearance and sonorous as well. They produce sound when struck. On the other hand, stone has no such property. It doesn't have a shiny appearance.
- Moreover, the surface of the metal is smooth, unlike stone which is generally rough in texture.
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