Platinum is a relatively rare, chemically inert, metallic element. It symbol
is Pt, atomic number is 78, and its atomic weight is 195.09. Platinum is one
of the heaviest substances known. One cubic foot of Platinum weighs 21 times
as much as a cubic foot of water. A grayish-white metal, Platinum has a melting
point of 1772 degrees C and a realatively high boiling point of 3827 degrees
C. It has a high fusing point, is ductile and malleable, expands slightly
upon heating, and has high electrical resistance. Platinum is seldom used
in its pure stage because it is too soft. The third most ductile metal, it
can be drawn into a thread one twenty thousandth part of an inch in thickness.
It is extremely resistant to attack by air, water, single acids and ordinary
reagents, but does dissolve in hot aqua regia, a mixture of nitric and hydrochloric
acids. Platinum has the unusual property of being able to absorb large amounts
of hydrogen at ordinary temperatures and resist it at high temperatures.
The first mention of Platinum occurs in the writings of an Italian physician
and poet named Julius Caesar Salinger in 1557. A hieroglypic character made
froma grain of Platinum dated back to the 7th century. Credit for discovery
of Platinum has been given to Don Antonio de Ulloa, a young lieutenant in the
Spanish Navy. The metal was referred to as the "platina de Pinto", meaning
the siver like metal from the Pinto River. The first thorough study of Platinum
was conductd in1750 by the English physician William Brownrigg. Brownrigg
noted that Platinum was heavier and even more chemically inert than Gold was.
Platinum forms useful alloys with many other metals, including Iridium,
Palladium, Rhodium, Ruthenium, Osmium, Gold, Nickel, Cobalt, and Tungsten.
At high temperatures Platinum also reacts with Chlorine, Fluorine, Phosphorus,
Arsenic and Sulfur. Among the transition metals, Platinum has the greatest
tendencies to bond directly with Carbon.
Platinum is used extensively
in modern industrial society because of its chemical inertness, high melting
point, and extraordinary catalytic properties. platinum is valuable for laboratory
apparatus, such as tongs, combustion boats, crucibles and evaoporating dishes.
It is also used for thermometers in furnaces, for electrodes in making quantitative
chemical analyses, and for corrosion and heat-resistant instruments.
Aluminum is the third most abundant element and most abundant metal in the Earth’s crust. Aluminum is never found in the free element state in nature. It
We use metals to construct all kinds of structures, from bridges to skyscrapers to elevators. The strength as well as durability of materials that are crafted out of metal make the materials ideal not only for construction but also for many other applications.
Lithium (Li), the third element on the periodic table, has a soft texture and a silver-white color. This element has an atomic number of three, and is located on the periodic table in the second period of the first group. In addition to being the first alkali metal on the periodic table, lithium is also the lightest metal; its weight is about 6.941 atomic mass units (AMU). Because it is a metal, lithium is mainly used in ionic bonds. Its common compounds include lithium hydride (LiH), lithium nitride (Li3N), lithium carbonate (Li2CO3), lithium hydroxide (LiOH), and lithium fluoride (LiF). Lithium is the thirty-third most abundant element and makes up a very small portion of the Earth’s crust. However, due to its high reactivity, it does not naturally occur in its pure form.
This element when becoming an isotope can become radioactive due to its high activity as a metal. In its natural state it is a soft metal and it has a shiny “ wax “ like silver/white color to it, it is so soft that a knife could cut through it without a problem.
Gold is the hero. Gold is the representation of an Anglo-Saxon hero, as portrayed by Beowulf. Within the epic poem, gold, along with other treasures represents the idealized values of generosity, the pursuit of glory, and the strong desire to leave a legacy.
The President gave orders to Miguel Angel Face, the President's confidential advisor, to help General Canales to escape. H...
I am going to discuss about the element known as gold in my assignment. To describe the element gold in simple terms, I can only say that it is an element (chemical element). This element is denoted by the symbol Au. It has an atomic number of seventy nine (79). I will describe quite a number of things concerning gold as an element. To begin with is:
Now I?m going to give you the chemical breakdown of neon. Neon?s atomic number is #10. Neon has 10 protons, 10 neutrons, and 10 electrons. It belongs to the Noble Gas section of the periodic table. Its atomic mass is 20.1797. All the noble gases have the maximum number of electrons possible in their outer shell making them stable and un...
An atom, by definition, is the smallest part of any substance. The atom has three main components that make it up: protons, neutrons, and electrons. The protons and neutrons are within the nucleus in the center of the atom. The electrons revolve around the nucleus in many orbitals. These orbitals consist of many different shapes, including circular, spiral, and many others. Protons are positively charged and electrons are negatively charged. Protons and electrons both have charge of equal magnitude (i.e. 1.602x10-19 coulombs). Neutrons have a neutral charge, and they, along with protons, are the majority of mass in an atom. Electron mass, though, is negligible. When an atom has a neutral charge, it is stable.
Aluminum is one of a number of soft metals that scientists call "poor" metals. It can be shaped and twisted into any form. It can be rolled into thick plates for armored tanks or into thin foil for chewing gum wrappers. It may be drawn into a wire or made into cans. Aluminum is a generally popular metal because it does not rust and it resists wear from weather and chemicals. (Bowman, 391) Aluminum is an element. Its atomic number is thirteen and its atomic weight is usually twenty-seven. Pure aluminum melts at 660.2ºC and boils at 2500ºC. Its density is 2.7 grams per cube centimeter. Aluminum is never found uncombined in nature. (Bowman, 391) Aluminum is a very useful metal that is light, easy to shape and can be strong. This makes aluminum one of the most used metals in the world, right behind iron and steel. (Geary, 185) In its pure state, aluminum is quite weak compared to the other metals. However, its strength can be greatly increased by adding small amounts of alloying elements, heat-treating, or cold working. Only a small percentage of aluminum is used in its pure form. It is made into such items as electrical conductors, jewelry, and decorative trim for alliances and cars. A combination of the three techniques has produced aluminum alloys that, pound for pound, are stronger than structural steel. Some common metals used in alloys for aluminum are copper, magnesium and zinc.(Walker, 31) The added elements give the aluminum strength and other properties. (Newmark, 41) Aluminum is one of the lightest metals. It weighs about 168.5 pounds per cubic foot, about a third as much as steel which weighs 487 pounds per cubic foot. (Neely, 214) As a result, aluminum has replaced steel for many uses. For example, some ...
Lead is a lustrous, silvery metal that tarnishes in the presence of air and becomes a dull bluish gray. Soft and flexible, it has a low melting point (327 °C). Its chemical symbol, Pb, is from plumbum, the Latin word for waterworks, because of lead's extensive use in ancient water pipes. Itsatomic number is 82; its atomic weight is 207.19.
The Web. The Web. 28 Apr. 2014. The 'Standard' of the 'Standard'. Metal Melting 101 - How To.