What is metals?

What Does metals Mean

The metals are chemical elements capable of driving electricity and heat , which exhibit a characteristic brightness and, with the exception of mercury, are solid at normal temperature.

The concept is used to name pure elements or alloys with metallic characteristics . Among the differences with non-metals, it can be mentioned that metals have low ionization energy and low electronegativity.
Metals are tough (they can receive sudden forces without breaking), ductile (they can be molded into threads or wires), malleable (they become sheets when compressed) and have good mechanical resistance (they resist tensile, bending, and twisting forces and understanding without deforming).

There are metals that appear in the form of native elements ( copper , gold , silver ), while others can be obtained from oxides, sulfides, carbonates or phosphates. Metals are often widely used in industry, as they offer great stability and have extensive protection against corrosion.
The benefits of metals have been known to man since prehistoric times. At first those that were easy to find in their pure state were used although, little by little, metals that were obtained from the use of furnaces began to be added.
The use of copper ore with tin allowed to create the alloy known as bronze , which ushered in a new historical era ( Bronze Age ).
Today it is possible to distinguish between different types of metals, such as precious metals (which are found in their natural state without the need to combine them with others to form compounds) and heavy metals (which exhibit a high density and have a certain toxicity).
Steel
Steel is an alloy of carbon (of which it can contain between 0.04% and 2.25%) and iron. The percentage of carbon it has and how it is distributed in the iron have a direct impact on its physical properties and its behavior at different temperatures .
It is one of the metals with the most applications in the industry; among other things, it is used for the manufacture of:
* tools and instruments used, in turn, to build cars and ships;
* the structural bases of buildings, thanks to their great resistance;
* hanging and arch bridges, among others;
* contemporary art;

* utensils of various types and small tools.
Copper
Copper is very ductile and malleable, and it resists corrosion very well. In addition, it conducts heat and electricity. With regard to its applications, it is used to:
* manufacture cables and components of electrical appliances;
* mint coins;
* make ornamental objects and kitchen utensils;
* produce electrotypes;
* reinforce parts of certain wooden structures.
Tin
Tin is a silvery-white metal which, if it is below 13 ° C, turns into a grayish powder and is called gray tin . Its main characteristics include its vulnerability to strong acids and that it emits a particular sound when bent (known as the tin cry ).
Tin is also one of the metals with important applications, such as the following:
* used in the form of paper to wrap and preserve some foods;
* used to create capacitor sheets, used in the electrical industry;
* protege la chapa de hierro (también llamada hojalata, usada para fabricar recipientes y otros envases) contra el óxido;
* puede alearse con otros metales para obtener materiales antifricción, que se usan en la fabricación de almohadillas.
Aluminio
El aluminio es el elemento metálico más abundante, y se caracteriza principalmente por su ligereza, por ser altamente reactivo, muy electro positivo y por poder reducir a metales básicos los compuestos metálicos. Cuando entra en contacto con el aire caliente, sufre de corrosión.
Es uno de los metales más usados en la industria, ya que sirve para:
* la construcción de medios de transporte aéreos y terrestres;
* the manufacture of kitchen utensils, aluminum foil, wire and pistons of internal combustion engines;
* make wrappers;
* the cast iron, since its tension and ductility are especially appreciated.

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