A metal is a chemical element that is a good conductor of both electricity and heat and forms cations and ionic bonds with non-metals. The 7 elements classified as “other metals” are located in groups 13, 14, and 15. While these elements are ductile and malleable, they are not the same as the transition elements. These elements, unlike the transition elements, do not exhibit variable oxidation states, and their valence electrons are only present in their outer shell. All of these elements have properties such as being solid, having a relatively high density, and are opaque. They have oxidation numbers of +3, ±4, and -3.
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