Metal definition, any of a class of elementary substances, as gold, silver, or copper, all of which are crystalline when solid and many of which are characterized by opacity, ductility, conductivity, and a unique luster when freshly fractured. Many metals are strong, shiny, and hard. Most metals are conductors of electricity, have crystalline solids with a metallic luster and have a high chemical reactivity. A heavy metal is a dense metal that is (usually) toxic at low concentrations. Metal. See more. They are also often malleable, meaning they can be shaped without breaking or cracking. Examples are Steel (Iron+Carbon, Bronze (Copper+Tin), and Electrum (Gold+Silver+::Copper). Patient discussion about heavy metals. Science >> Chemistry for Kids Around 75% of the elements in the periodic table are metals. are common elements. While the term transition has no particular chemical significance, it is a convenient name by which to distinguish the similarity of the atomic structures and resulting properties of the elements so designated. It mainly includes the transition metals, some metalloids, lanthanides, and actinides.Many different definitions have been proposed—some based on density, some on atomic number or atomic weight, and some on chemical properties or toxicity. A metal Alloy is a mixture of two or more elements in a solidified solution. A heavy metal is a member of a loosely-defined subset of elements that exhibit metallic properties. Metals are defined as those elements which have characteristic chemical and physical properties. A metal is said to be an active metal when it reacts strongly and quickly with other elements due to the electrons in its structure and its ease of sharing the electrons with other elements. Up to this day, what elements ought to be included in this group is hugely disputed. Three years ago I was diagnosed with off the lab chart levels of platinum in my body. Please tell me more! Transition metal definition is - any of various metallic elements (such as chromium, iron, and nickel) that have valence electrons in two shells instead of only one —called also transition element. In chemistry, the periodic table of elements depicts all of the known elements. Metals are known for conducting electricity and heat well. The most active metals are the elements on the left side of the periodic table. Metal Chemistry - Other Metals. Definition of metals 1) Elements that form cations when compounds of it are in solution and oxides of the elements form hydroxides rather than acids in water. Q. I was told that platinum is used in fragrances for the fullness of the spray. Metallic elements characteristically form positive ions when their compounds are in solution.Their oxides form hydroxides rather than acids with water.Nearly three-fourths of the elements in each group of the periodic table are metals except for the Group 17 (halogen) and Group 18 (noble gas) elements. Transition metal, any of various chemical elements that have valence electrons—i.e., electrons that can participate in the formation of chemical bonds—in two shells instead of only one. A material is called a metal based on the way it reacts to other elements. The familiar types of metals are (iron, aluminium, copper, lead, zinc, silver, gold, etc.) Other metals, or post-transition metals, are the group of elements on the periodic table that are situated to the right of the transition elements. In chemistry, a metal is a chemical element whose atoms readily lose electrons to form positive ions, and form metallic bonds between metal atoms and ionic bonds between nonmetal atoms. 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