Element (Element) is a compound that contains atoms only, such as sodium (Na), magnesium (Mg), carbon (C), oxygen (O), etc., in the elements into categories to residential properties, the similarity of each element is. criteria such as the use of a metal and nonmetal a basis divided into 3 groups: metals, semi-metals and non-metals, and also dividing elements in 3 groups into smaller groups as well as groups using its status as the agility of the birth. reaction And look at the diagram so we usually divided into 3 types of elemental metal (Metal) metal (Non-metal) , category (Metalloid or Semi metal).
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