In chemistry and physics, a metal is defined as a solid chemical element or alloy characterized by high electrical and thermal conductivity, high luster, malleability, ductility, and a crystal lattice structure bonded by free-moving valence electrons. Metals readily lose electrons to form positive ions. In everyday human civilization and infrastructure, metals serve as indispensable foundational building blocks utilized in everything from microelectronics and architectural roofing components to massive load-bearing structural frameworks.
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