Metals Flashcards, test questions and answers
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What is Metals?
Metals are a class of chemical elements that are characterized by their lustrous, shiny appearance and excellent electrical and thermal conductivity. They typically have high melting points, densities, and metallic luster. The most abundant elements in the Earth’s crust include iron, aluminum, copper, lead, zinc, nickel and tin. Metals are malleable materials which can be cast into different shapes or forged under pressure to produce new structures. These materials have been used since ancient times for making tools such as weapons and jewelry. Metals can also be alloyed with other metals or nonmetallic substances to achieve desired properties such as increased strength or improved corrosion resistance.Metals have many applications due to their unique properties. For example, metals are often used to make car bodies because they are lightweight yet strong enough for the purpose. In addition, metal wire is widely used in electrical wiring due to its high conductivity of electricity over long distances with minimal energy loss through heat dissipation. Metals also play an important role in modern technology from aerospace components to medical instruments such as hip replacements or implantable pacemakers that require precise fabrication techniques demanding extreme accuracy when cutting metals into complex forms; these techniques would not be possible without metal alloys known for their superior mechanical strength at elevated temperatures. Overall, metal has provided humanity with immense advantages from engineering feats like bridges spanning rivers and oceans to everyday objects like sports equipment or cutlery that we use every day all thanks to its unique combination of physical characteristics that makes it so versatile yet enduringly useful material across countless applications.