Fig. 1 B. Question (50%) 6. Define smart materials. Give an example of such mate

Question

Fig. 1 B. Question (50%) 6. Define smart materials. Give an example of such material and an application for it (10%) 7. Describe the properties (electrical, mechanical, etc.) of materials that are exclusively made up of (a) 8. Explain why covalently bonded materials are generally less dense than ionically or metallically bonded 9, Please give the electron configurationfor the following ions(10%) 10, Relative to electrons and electron states, what does each of the four quantum numbers specify? (1096) ionic bonds, (b) covalent bonds, and (c) metallic bonds. Name a material for each type(10%) ones.( 1 0%) (a) S' (b) Fe" (c) Ni (d) Ar (e) Al"

Explanation / Answer

[6]

Smart materials are the materials that can show one or more alternative chemical or physical properties based upon the external stimulus provided .The external stimulus can be electric current, magnetic field, electric field, temperature and pressure...etc.

For example photo sensitive material also called photovoltaic or optoelectronic material are a class of smart materials that can produce electric current when irradiated by light. These are typically used in modern day solar cells.

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