![]() ![]() Palladium is soft, ductile, and does not react easily with the oxygen present in the atmosphere. It is silvery-white in color and is the least dense among all the platinum group elements. Properties: Palladium is the rarest of the platinum group elements and belongs to the group 10 of the periodic table. Silver foils are used for decorating food items and desserts such as cookies. The most common use of silver in medicine, is in dentistry, where amalgams of silver are used as dental fillings. It is used as a catalyst in oxidation reactions. Halides and nitrates of silver are photosensitive and are used in developing photographs from films. Due to its high electrical conductivity, it is used in electrical conductors. The use of silver coins as currency can be traced back to thousands of years and silver was regarded as the monetary standard in the European countries and the Americas, till the 19th century. Uses: Silver is mostly used in making jewelry, utensils, and currency coins. However, it reacts with ozone and hydrogen peroxide, and dissolves in nitric acid. Silver is malleable and ductile, and inert to atmospheric oxygen. It is the element with the highest electrical conductivity and has the highest thermal conductivity among metals. Properties: Silver is a transition metal that is white in color, soft, and lustrous. There are many uses of gold, in addition to its use in jewelry and as a monetary standard. The only compound that can dissolve gold is aqua regia – a mixture of hydrochloric acid and nitric acid in the ratio of 3:1. It is a “noble metal” that reacts with a very few substances and does not dissolve in acids. Gold is malleable, ductile, and a very good conductor of heat and electricity. ![]() Uses: It is the most commonly used metal in jewelry making, not only because of its beautiful shine and color but also because it is a soft metal on which designs are easy to make. For ages, gold has been used as a vehicle for monetary exchange, and to this day, the wealth of a country is indicated by the amount of gold in its reserves. Base metals such as copper are alloyed with gold to give it strength. ![]() Properties: Gold, in its purest form, is 24 carats but pure gold is not used for making jewelry as it is a very soft metal. Gold can occur in nature in many forms, including sheets and grains. In the U.S., it is mainly mined in the state of California. South Africa is the biggest producer of gold in the world. It is a rare metal and can only be found in certain parts of the world. Gold is a transition metal that belongs to group 11 of the periodic table. ![]()
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