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A metal (from Ancient Greek μέταλλον (métallon) 'mine, quarry, metal') is a material that, when polished or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well.
- Metal (Disambiguation)
Metal (API), a graphics API from Apple for iOS and macOS...
- Metallic Bond
Metallic bonding is a type of chemical bonding that arises...
- Metalloid
A metalloid is a chemical element which has a preponderance...
- Heavy metal (elements)
t. e. Heavy metals are metallic elements with relatively...
- Metal (Disambiguation)
The chemical elements can be broadly divided into metals, metalloids, and nonmetals according to their shared physical and chemical properties. All elemental metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metallic elements; and have at least one basic oxide.
t. e. Heavy metals are metallic elements with relatively high densities, atomic weights, or atomic numbers. The criteria used, and whether metalloids are included, vary depending on the author and context and has been argued should not be used. [2][3] A heavy metal may be defined on the basis of density, atomic number or chemical behaviour.
- 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...
6 days ago · 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.
- The Editors of Encyclopaedia Britannica
Select your top ten metal albums of the year; they have to be metal, they have to be new, original material, they have to be on MA, and they have to have been released in 2022. Put your list in order, with #1 being the album you liked the most.
Transition metal, any of various chemical elements that have valence electrons—i.e., electrons that can participate in the formation of chemical bonds—in two shells instead of only one. They occupy the middle portions of the long periods of the periodic table of the elements.
