1. What are elements? How are they different from mixtures?
2. Aluminium is used in making utensils used for cooking food? Which property of Aluminium is
being used here?
3. Can we use Carbon to make wires for household usage? Why or why not? Explain.
4. Define malleability and Ductility.
Answers
Answer:
1. The individual components of a mixture can be physically separated from each other. Chemical compounds are very different from mixtures: The elements in a chemical compound can only be separated by destroying the compound.
2. Good thermal conductivity, malleability, lightweight, and high melting point are the properties of aluminum due to which it is used for making cooking utensils.
3. It cannot be used as a wire because it has no tensile strength worth crowing about. All metals beat carbon hands down for conducting electricity with Silver Gold and Copper being at the top. Carbon per-se is not a good conductor, it's resistance increases with its thickness.
4. Ductility is a measure of a material's ability to undergo significant plastic deformation before rupture or breaking, which may be expressed as percent elongation or percent area reduction from a tensile test. According to Shigley's Mechanical Engineering Design significant denotes about 5.0 percent elongation. the state of being malleable, or capable of being shaped, as by hammering or pressing: the extreme malleability of gold.