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Most metallic in Group 5A is Bismuth (Bi) or element 115
What are metallic elements?
An alloy, such as steel or bronze, is made of two or more metals. Usage We think of metals as hard, shiny materials used to make things like paper clips and cars. But for chemists, metal is a chemical element that loses electrons in a chemical reaction. Metal atoms do this because of the structure of their electron shells—the layers in which electrons are arranged around an atom's nucleus. If an element's outermost electron shell is filled, the element is stable and does not react easily. But if the shell contains only a few electrons, the atom will try to share them with another atom in a chemical reaction, thereby becoming stable. Elements having only one electron in their outermost shell are the most reactive; all they have to do to become stable is lose this electron. Such elements are alkali metals like sodium and potassium they are listed in the left-hand column of the Periodic Table at Periodic Table. The metals farther toward the right side of the Periodic Table, such as tin and lead, have more electrons in their outermost shell and are not as reactive because sharing or losing all these electrons would require more energy. The elements that fall between these extremes are somewhat reactive and are called transition elements. They include elements like iron, copper, tungsten, and silver.
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