Classification Of Elements: Metals, Non-Metals And Metalloids

•  Metals Metals are characterized by being good conductors of electric current and heat, they are ductile and malleable, they present a metallic luster, they are all solid, except for mercury; They have a high density, but one of their most significant properties is that when they join other elements, they lose electrons, forming positive ions.
• No metals. Nonmetals are characterized by being poor conductors of electric current and heat, with the exception of graphite carbon; they are usually opaque and brittle, they can exist in any state of aggregation (solid, liquid and gaseous); One of its significant properties is that when they join other elements, they gain electrons, forming negative ions.
• Metalloids. They are those that share some of the characteristics of metals but without being so.
Lewis Octet Rule.
This rule establishes that all elements will tend to acquire an electronic configuration, similar to that of noble gases, with eight electrons in the last energy level.
Noble gases are the most stable elements known, this is considered because their atoms have all their complete orbitals. For this reason it is believed that the other elements unite with each other, to acquire the necessary electrons, for their atoms and are as stable as those of the noble gases; This is achieved when at the last level they have eight electrons.