Metals
Metals
Metals (/ˈmetəlz/) are a group of elements that are good conductors of heat and electricity, have a shiny appearance, are hard, and are malleable and ductile. The term "metal" is derived from the Greek word "metallon" which means "mine, quarry, metal".
Characteristics of Metals
Most metals have the following characteristics:
- Conductivity: Metals are good conductors of electricity and heat.
- Malleability: Metals can be hammered into thin sheets.
- Ductility: Metals can be drawn into wires.
- Luster: Metals have a shiny appearance.
- Density: Metals have high density and are heavy.
- Melting Point: Metals have high melting points.
Types of Metals
Metals can be classified into different types based on their properties:
- Alkali Metals: These are very reactive metals which do not occur freely in nature. Examples include Lithium, Sodium, and Potassium.
- Alkaline Earth Metals: These are reactive but less so than alkali metals. Examples include Magnesium and Calcium.
- Transition Metals': These are metals with high melting points and high specific gravity. Examples include Iron, Copper, and Nickel.
- Post-Transition Metals: These are metals that follow the transition metals in the periodic table. Examples include Aluminum, Tin, and Lead.
- Metalloids: These are elements that have properties of both metals and non-metals. Examples include Silicon and Germanium.
Uses of Metals
Metals have a wide range of uses due to their varied properties. Some of the uses include:
- Construction: Metals like steel, iron, and aluminum are used in the construction of buildings, bridges, and other structures.
- Electronics: Metals like copper and gold are used in the manufacturing of electronic devices.
- Jewelry: Precious metals like gold, silver, and platinum are used in the making of jewelry.
- Transportation: Metals are used in the manufacturing of vehicles, aircraft, and ships.
External links
- Medical encyclopedia article on Metals
- Wikipedia's article - Metals
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