Alloys are used in technology rather than pure metals because they often have improved properties compared to pure metals. For example, alloys can be stronger, more durable, and have better resistance to corrosion. By combining different metals, engineers can tailor the properties of the alloy to meet specific technological requirements. Additionally, alloys can also be more cost-effective than pure metals, making them a preferred choice for many industrial applications. **

Alloys are materials made by combining two or more metallic elements to create a new material with enhanced properties, such as increased strength or corrosion resistance. Common examples of alloys include steel (iron and carbon) and brass (copper and zinc). Composite materials are made by combining two or more different materials to create a new material with unique properties that are different from the individual components. These materials often consist of a matrix material reinforced with fibers or particles. Examples of composite materials include carbon fiber reinforced polymers (CFRP) and fiberglass. **

Metals are rarely used in pure form because they are often too soft, malleable, or have other undesirable properties for certain applications. Alloys are created by mixing two or more metals together, or by combining a metal with other elements, to enhance their properties and make them more suitable for specific uses. Alloys can improve the strength, hardness, corrosion resistance, and other characteristics of metals, making them more versatile and practical for a wide range of applications. **

Alloys are more stable than pure metals because they have a more uniform and consistent structure. The addition of different elements to the metal matrix disrupts the regular arrangement of atoms, making it more difficult for dislocations to move through the material. This results in increased strength and resistance to deformation, making alloys more stable and durable than pure metals. Additionally, the presence of different elements in the alloy can also lead to the formation of new phases, which can further enhance its stability and properties. **

The electrical conductivity of alloys is generally lower than that of pure metals. This is because the presence of different elements in alloys can disrupt the regular arrangement of atoms in the metal lattice, leading to increased resistance to the flow of electrons. Additionally, the presence of impurities and defects in alloys can further hinder the movement of electrons, resulting in a decrease in electrical conductivity compared to pure metals. **

The thermal linear expansion in plastics is much higher than in metals because of the difference in their molecular structures. Plastics are made up of long chains of molecules that have more freedom to move and slide past each other when heated, causing them to expand more easily. In contrast, metals have a more rigid and closely packed atomic structure, which limits their ability to expand when heated. This difference in molecular structure results in plastics having a much higher coefficient of thermal expansion compared to metals. **

Pure metals have higher electrical and thermal conductivity compared to alloys due to the absence of impurities. They also have better ductility and malleability, making them easier to shape and form. Additionally, pure metals tend to have a higher level of corrosion resistance compared to alloys, which may contain different metals that can react with the environment. **

Pure metals have a higher level of electrical and thermal conductivity compared to alloys. They also have a higher level of ductility and malleability, making them easier to work with in terms of shaping and forming. Additionally, pure metals tend to have a higher level of corrosion resistance compared to alloys, which can be advantageous in certain applications. **