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The transition metals, also called transition elements is the group to which belongs gold. This group of chemical elements belonging to gold, are those at the center of the periodic table, specifically in block d. Among the features that have the gold as well as those of other metals tansición is included in the electronic configuration d orbital, partially filled with electrons. Properties of such metals, including gold is are its high hardness, having boiling points and higher melting and be good conductors of electricity and heat.

Gold state in its natural form is solid. Gold is a metal chemical aspect elmento yellow and belongs to the group of transition metals. The atomic number of gold is 79 The chemical symbol for gold is Au. The melting point of gold is 1337.33 or 1065.18 degrees Kelvin degrees Celsius or degrees Fahrenheit. The boiling point of gold is 3129 degrees Kelvin or 2856.85 degrees Celsius or degrees Fahrenheit.

Physical properties: The density of gold is 19.3 times that of water at 20 ° C (68 ° F), such that 1 m3 of gold weighs about 19 000 kg (1 ft3, about 1200 pounds). The masses of gold, like other precious metals are measured in Troy scale, which contains 12 ounces per pound. It melts at 1063ºC (1947.97ºF) and boils at 2970ºC (5180ºF). It is somewhat volatile below its boiling point. It is a good conductor of heat and electricity. It is the most malleable and ductile metal. Can be made transparent sheets with thickness of 0.00001 mm stretch easily or in wire weighing 0.5 mg / m. Its quality is expressed in the range of fineness as pure gold parts per thousand parts of total metal, or in the range of carat as pure gold parts 24 parts of total metal. Gold dissolves readily in mercury to form amalgams. It is one of the least chemically reactive metals. No tarnish, or burn the air. It is inert in strongly alkaline solutions and all pure acids, selenic acid less.

Chemical properties of gold

Name gold

atomic number 79

Valencia 1.3

Oxidation state +1

electronegativity 2.4

Covalent radius (Å) 1.50

Ionic radius (Å) 1.37

Atomic radius (Å) 1.44

electronic configuration [Xe] 4f145d106s1

first potential

ionization (eV) 9.29

Atomic mass (g / mol) 196.967

Density (g / ml) 19.3

Boiling Point (° C) 2970

Melting point (° C) 1063

discoverer 3000 AC

Location: Gold is distributed worldwide, but very little, in such a way that it is a rare item. Seawater contains low concentrations of gold of about 10 parts of gold per billion parts of water. Plankton in the sea floor or accumulate higher concentrations. At present,

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