The metals are chemical elements capable of conducting electricity and heat, luster and a characteristic feature that, except for mercury, are solid at normal temperature.
The term is used to refer to pure elements or alloys with metallic characteristics. Among the differences with the non-metals can be mentioned that the metals have a low ionization energy and low electronegativity.
The metals are tenacious (can receive sudden forces without breaking), ductile (you can mold them into wires or wires), flexible (converted into blades to be compressed) and have a good mechanical resistance (resist tensile stress , bending, torsion and compression without deforming).
There are metals that appear in the form of native elements (copper, gold, silver), while others may be obtained from metal oxides, sulphides, carbonates or phosphates. The metals are usually widely used in industry, for conferring great stability and have a broad protection against corrosion.
The virtues of metals are known to man since prehistoric times. Initially, these were used that were easy to find in a pure state but gradually it has begun to use metals that are obtained from the use of ovens.
The use of mineral copper with tin allowed the creation of the alloy known as bronze, which gave rise to a new historical era (Bronze Age).
Nowadays, one can distinguish different types of metals such as precious metals (which are found in their natural state without the need to combine with one another to form compounds) and heavy metals (which have a high density and have a certain toxicity).