Metallic elements are a group of chemical elements characterized by their shiny appearance, good electrical and thermal conductivity, and malleability. They are typically solid at room temperature, with the exception of mercury, which is a liquid. Common examples of metallic elements include iron, copper, and aluminum. These elements tend to lose electrons easily, forming positive ions. Metals are often categorized into different groups, such as alkali metals, alkaline earth metals, and transition metals. They play a crucial role in various industries, including construction, electronics, and manufacturing. Their unique properties make them essential for creating tools, machinery, and infrastructure.