Search Results - Periodic table (metals and non-metals)

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1. Scandium: Characteristics, Origin and Applications January 02, 2012 Learn more about the transition metal called scandium - its characteristics, history, and uses and applications. Historically considered a rare earth metal, Scandium is a transition metal with a chemical element symbol “Sc” and atomic number 21 (its number in the periodic table). It is one of the scarcest chemical elements available for extraction; it has only a few known sources worldwide where it is found co-present in rare earth deposits and deposits of uranium compounds. Characteristics Scandium has a silvery white color with a hexagonal crystal structure when seen under the... (read more) Author: Rowena Hernandez

2. Tungsten: History, Property and Uses December 16, 2011 Under standard conditions, tungsten is a hard metal. Tungsten is also known as wolfram and has the atomic number 74 and the symbol of W on the periodic table. It is a chemical element. On earth, tungsten is only found within chemical compounds. The important ores of tungsten are scheelite and wolframite. As a free element it has a remarkable robustness and has the highest melting point out of any of the non alloyed metals. It has the second highest melting point out of all the elements falling behind only carbon. History Carl Wilhelm Scheele, in 1781, along with Torbern Bergman found... (read more) Author: Judy Mercy

3. Tantalum: History, Properties and Uses December 16, 2011 Tantalum is represented on the periodic table by the symbol Ta and has the atomic number 73. Tantalum was called tantalium previously, which comes from the character in Greek mythology, Tantalus. Tantalum is one of the elements in the refractory metals group. Refractory metals are often used as small components in alloys. It is a transition metal that is hard and blue-gray in color. It is also very rare. History In 1802, Anders Ekeberg discovered the element tantalum in Sweden. A year before, Charles Hatchett, had discovered columbium. William Hyde Wollaston, compared oxides taken fr... (read more) Author: Judy Mercy

4. Lithium: History, Production and Uses December 16, 2011 Lithium is part of the alkali metals in the group of chemical elements. The atomic number of lithium is 3 and it is represented on the periodic table under the symbol Li. It is silver-white in color and soft. Lithium in standard conditions has the lowest density of all solid elements and is also the lightest of the metals. As with all of the alkali metals, lithium is extremely flammable and reactive. This is why it is usually stored in mineral oil. The high reactivity of lithium means that it does not occur freely in nature and is only seen in compounds. Typically these compounds are ion... (read more) Author: Judy Mercy

5. Copper: History, Production and Uses December 16, 2011 Cu and the atomic number 29 are the symbols of copper on the periodic table. Copper is a ductile metal that has a high electrical and thermal conductivity level. Copper in its pure form is extremely soft and malleable. History The history of copper use dates back at least 10,000 years. Since copper occurs naturally, it is known to be used by some of the oldest recorded civilizations. The estimates of the discovery of copper date it to around 9000 BC. It is thought to have first been used in the Middle East. There was a pendant made of copper found in the northern part of Iraq that is... (read more) Author: Judy Mercy

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