What is the Meaning & Definition of Metal

It is known with the name of metal to those chemicals which are characterized mainly by be excellent conductors of heat and electricity, hold a very important density and remain solids at normal temperatures.
Meanwhile, called metal those pure materials such as gold, silver and copper, but also those features metal such as steel and bronze alloys.
Among the most recognizable properties that usually metals we find that most are grayish, although in some color other denominator as yellow in gold and red in the copper. In addition, a considerable density, strength, brilliance, malleability, ductility, toughness and conductivity of electricity and heat, are also counted as their characteristic properties.
In prehistoric times, metals, only used in its pure State (gold, silver, copper), but thanks to the technological advances to which was slowly becoming man began to develop different techniques to obtain new metals from their ores, by heating them in a coal oven. The first step in this regard was awarded the bronze product of use such as the copper with incursions of tin ore. You would then iron, still in time before Christ, which was widely used to produce the first weapons such as swords.
Metal is one of the most used and required by the industry, either that or by its strength and stability, among other issues, they tend to be ideal to protect certain structures against corrosion, to stabilize plastic materials, although it can also be used in other fields like medicine and chemistry, i.e., not everything is reduced to the industry , although the is most available metals.