Transition+Metals+(Groups+10,+11+ans+12)

Transition Metals (groups 10, 11 and 12)

//__ {Transition metals and chemical elements} __// Nickel is a chemical element with the chemical symbol **Ni** and the atomic number of 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile. Pure nickel shows a significant chemical activity, though larger pieces of the metal are slow to react with air at ambient conditions due to the formation of a protective oxide surface. Nickel was first isolated and classified as a chemical element in 1751 by Axel Fredrik Cronstedt. Because of nickel's slow rate of oxidation at room temperature, it is considered corrosion-resistant.


 * Gold ** is a chemical element with the symbol **Au** and an atomic number of 79. Gold is a, soft, shiny and ductile metal. Pure gold has a bright yellow colour. Gold is a transition metal and a group 11 element. It is one of the least reactive solid chemical elements. Gold resists attacks by individual acids, but it can be dissolved by the aqua regia (nitro-hydrochloric acid). Gold also dissolves in alkaline solutions of cyanide, which have been used in mining. Gold dissolves in mercury, forming amalgam alloys.

`Zinc or **spelter**, is a metallic chemical element; it has the symbol **Zn** and atomic number of 30. In the periodic table Zinc is the first element of group 12. Zinc is, in some respects, chemically similar to magnesium, because its ion is of similar size. Zinc is the 24th most abundant element in the Earth's crust and has five stable isotopes.

Cadmium is a chemical element with the Chemical symbol of **Cd** and the atomic number of 48. This soft and bluish white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Cadmium is similar to zinc because it prefers oxidation state +2, however most of its compounds and similar to mercury because it shows a low melting point compared to the transition metals.

Silver is a metallic chemical element with the chemical symbol of **Ag** and atomic number of 47. Silver is a soft, white, lustrous transition metal. It has the highest electrical conductivity of any element and the highest thermal conductivity of any metal. The metal occurs naturally in its pure form, (native silver). As an alloy with Gold and other metals such as Zinc. Most silver is produced as a byproduct of Copper, Gold, Lead, Zinc and some others.(BY IBRAHIM HADDAD)