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A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride. In physics, a metal is generally regarded as any substance capable of conducting electricity at a temperature of absolute zero.
- Metal (Disambiguation)
A metal is a material that is typically hard, opaque, shiny,...
- Metallic Bond
Metallic bonding is a type of chemical bonding that arises...
- Metalloid
A metalloid is a type of chemical element which has a...
- Metal (Disambiguation)
Heavy metal (or simply metal) is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom and United States. With roots in blues rock, psychedelic rock and acid rock, heavy metal bands developed a thick, monumental sound characterized by distorted guitars, extended guitar solos, emphatic beats and ...
- Late 1960s, United Kingdom and United States
- Metal
Heavy metal genres. A number of heavy metal genres have developed since the emergence of heavy metal (often shortened to metal) during the late 1960s and early 1970s. At times, heavy metal genres may overlap or are difficult to distinguish, but they can be identified by a number of traits.
- The Ways That Metals Are Alike
- Use of Metals
- Alloys of Metals
- Metals in Chemistry
- Metals in History
- Metals in Astronomy
- Biological Role in Humans
Most metals are hard, shiny, they feel heavy and they melt only when they are heated at very high temperatures . Lumps of metal will make a bell-like sound when they are hit with something heavy (they are sonorous).Heat and electricity can easily pass through a metal (it is conductive). A lump of metal can be beaten into a thin sheet (it is malleab...
Metals are very useful to people. They are used to make tools because they can be strong and easy to shape. Iron and steel have been used to make bridges, buildings, or ships. Some metals are used to make items like coins because they are hard and will not wear away quickly. For example, copper (which is shiny and red in color), aluminium (which is...
Many things that are made of metals may, in fact, be made of mixtures of at least one metal with either other metals, or with non-metals. These mixtures are called alloys. Some common alloys are: 1. Steel (iron and carbon) (Carbon is a non-metal) 2. Brass (copper and zinc) 3. Bronze (copper and tin) 4. Duralumin (aluminium and copper) 5. Gunmetal (...
In chemistry, metal is a word for a group of chemical elements that have certain properties. It is easy for the atoms of a metal to lose an electron and become positive ions, or cations. In this way, metals are not like the other two kinds of elements - the nonmetals and the metalloids. Most elements on the periodic tableare metals. On the periodic...
The use of metals is said to be one of the things that makes people different from animals. Before they used metals, people made tools from stones, wood, and animal bones. This is now called the Stone Age. No-one knows when the first metal was found and used. It was probably what is called native copper, which is sometimes found in large lumps on t...
In astronomy, a metal is any element other than hydrogen or helium. This is because these two elements (and sometimes lithium) are the only ones that form outside stars. In the sky, a spectrometer can see the signs of metals and show the astronomer the metals in a star.
In humans, some metals are essential nutrients like iron, cobalt, and zinc. Some metals can be harmless such as ruthenium, silver, and indium. Some metals can be toxic in large amounts. Other metals such as cadmium, mercury, and lead, are very poisonous. Sources of metal poisoning include mining, tailings, industrial wastes, agricultural runoff, oc...
Wrought iron. Steel is an alloy of iron and carbon with improved strength and fracture resistance compared to other forms of iron. Many other elements may be present or added. Stainless steels, which are resistant to corrosion and oxidation, typically need an additional 11% chromium.
Iron. Iron is a chemical element; it has symbol Fe (from Latin ferrum 'iron') and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's outer and inner core.
Metal, any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light. Approximately three-quarters of all known chemical elements are metals. Learn more about metals in this article.