The term ” metal ” (word from the Greek metalon ) refers to one of the four proposed classifications for the chemical elements of the Periodic Table (the others are: no metals, noble gases and hydrogen). There are 94 metals out of a total of 118 elements in the Periodic Table.
Metals features in periodic table
Metals have unique characteristics that differentiate them from other substances: they are solid at room temperature (25 ° C) and have a silver color.
But there are exceptions such as Copper (Cu) and Gold (Au) that have red and gold color respectively. Mercury (Hg) is the only metal found in nature in a liquid state.
The atomic structure of metals is crystalline , which consists of metal cations wrapped by a cloud of electrons. The ability of metals to conduct electricity is explained by the presence of this electron cloud, which conducts electric current in electrical wires, not only in them, but in any metallic object.
Metallic objects, once polished, have a characteristic shine, due to the free electrons located on the surface of the metals that absorb and radiate light.
Metals have the ability of metals to produce very thin plates and plates.
If we apply the appropriate pressure in specific regions of the surface of a metal, it can be transformed into wires and blades, due to the sliding caused by the layers of atoms.
Metals are excellent conductors of electrical current and heat. The electric transmission cables are made of aluminum or copper, as well as the pots we use to cook food. Metals have the ability to conduct heat 10 to 100 times faster than other substances.
High boiling melting point:
Tungsten metal melts at a temperature of 3,410 ° C and boils at 4,700 ° C.
Importance of metals in periodic table
The earth itself contains many elements, of which more than 80% are metals. Metals are recyclable and are used in all types of objects and products , from cosmetics to batteries.
Aluminum, enabled the development of modern commercial aviation . Stainless steel utensils would not exist if it were not for nickel and chrome.
Electric power can travel long distances thanks to copper wires. Even new technologies with solar cells use metals such as silicon and cadmium. Apparently there are metals everywhere.
Some foods need to be packaged in cans. The packaging industry is based on metals, like most industries.
Because metals combine performance with accessibility, they are found in many consumer goods , such as mobile phones, sports equipment and television.
Metal fabrication and stamping processes help produce precision and customized parts for the national, aerospace, health and automotive defense industries.
Objects such as fuel injectors, oxygen sensors and brake systems work thanks to metals.
Not only does your body need metals such as zinc and copper to function properly , but without metals your computer would not exist.