What is the chemical symbol of iron
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Pure iron (Fe) has a fixed melting point of ° C, chromium (Cr) of ° C and nickel (Ni) of ° C compared to ° C for stainless steel of type Iron – Heavy Metal. Iron is a chemical element in the periodic table that has the symbol Fe and atomic number Iron is . Chemical elements listed by symbol The elements of the periodic table sorted by symbol. click on any element's name for further chemical properties, environmental data or health effects.. This list contains the elements of chemistry.
Platinum Ptchemical elementthe best known and most widely used of the six platinum metals of Groups 8—10, Periods 5 and 6, of the periodic table. A very heavy, precioussilver-white metalplatinum is soft and ductile and has a high melting point and good resistance to corrosion and chemical attack. For example, its surface remains bright after being brought to white heat in air, and, though it readily dissolves in aqua regiait is scarcely attacked by simple acids.
It does dissolve slowly in hydrochloric acid in the presence of air. Small amounts of iridium are commonly added to give a harder, stronger alloy that retains the advantages of pure platinum. Platinum, one of the most abundant platinum metals, and its alloys are indispensable in the chemical laboratory for electrodes and for crucibles and dishes in which materials can be heated to high temperatures. Platinum is used for electrical contacts and sparking points because it resists both the high temperatures and chemical attack of electric arcs.
Jewelry and dental alloys account for much of its use; platinum-iridium is used for surgical pins. The prototype international standard kilogram of mass was made from an alloy of 90 percent platinum and 10 percent iridium.
As a catalystplatinum has many applications, notably in automotive catalytic converters and in petroleum refining. The Spaniards called the new metal platina del Pinto for its resemblance to silver. Placer deposits are the most productive sources of the native element. The ordinary variety of native platinum is called polyxene; it is 80 percent to what std causes bumps on the skin percent platinum, with 3 percent to 11 percent ironplus the other platinum metals, and goldcopperand nickel.
For mineralogical properties, see native element table. Platinum is also found in the very rare native alloy platiniridium. Platinum occurs combined with arsenic as sperrylite PtAs 2 in the copper—nickel mining district near How to spot counterfeit golden virginia, Ontarioand with sulfur as cooperite PtS in the Transvaal.
For information about the mining, recovery, and production of platinum, see platinum processing. It is capable of absorbing large volumes of hydrogen what is the chemical symbol of iron, and, with palladiumit is one of the most reactive platinum metals. Among the transition metals, platinum has one of the greatest tendencies to form bonds directly with carbon. Platinum also combines with a number of nonmetallic elements on heating, such as phosphorusarsenicantimonysiliconsulfurand selenium.
Natural platinum is a mixture of six isotopes : platinum 0. All are stable except platinum, which has been reported as a long-lived alpha emitter. Additional Info. More About Contributors Article History. Print Cite verified Cite. While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
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Britannica Quiz. The periodic table is made up of elements. How well do you know their symbols? Get a Britannica Premium subscription and gain access to exclusive content. Subscribe Now. Element Properties atomic number 78 atomic weight Learn More in these related Britannica articles:. In Wollaston formed a cost-sharing partnership with Smithson Tennant, whom he had befriended at Cambridge, to produce and market chemical products. Although Tennant achieved only limited success in his independent endeavours, Wollaston was spectacularly successful.
He set about trying to…. On a further, gentle firing, gold yields a purplish colour, silver a pale straw colour, platinum retains its natural hue, and copper varies from lemonish yellow to gold and rich brown. Lustre painting was invented by…. Wares were also painted or stencilled with lustre patterns. The most valuable type…. History at your fingertips. Sign up here to see what happened On This Dayevery day in your inbox!
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Symbol: He Atomic Number: 2 Atomic Mass: amu Melting Point: °C ( K, °F) Boiling Point: °C ( K, °F) Number of Protons/Electrons: 2 Number of Neutrons: 2 Classification: Noble Gas Crystal Structure: Hexagonal Density @ K: g/cm 3 Color: colorless Atomic Structure. In contrast, if iron and sulfur are heated together in a certain ratio (1 atom of iron for each atom of sulfur, or by weight, 56 grams (1 mol) of iron to 32 grams (1 mol) of sulfur), a chemical reaction takes place and a new substance is formed, the compound iron(II) sulfide, with chemical formula FeS. The resulting compound has all the. For example, in the iron-sulfur equation the symbol Fe represents grams of iron, S represents grams of sulfur, and FeS represents grams of iron sulfide. Because matter is not created or destroyed in a chemical reaction, the total mass of .
In reactions under normal laboratory conditions, matter is neither created nor destroyed, and elements are not transformed into other elements. Therefore, equations depicting reactions must be balanced; that is, the same number of atoms of each kind must appear on opposite sides of the equation. The balanced equation for the iron-sulfur reaction shows that one iron atom can react with one sulfur atom to give one formula unit of iron sulfide.
Chemists ordinarily work with weighable quantities of elements and compounds. For example, in the iron-sulfur equation the symbol Fe represents Because matter is not created or destroyed in a chemical reaction, the total mass of reactants is the same as the total mass of products. If some other amount of iron is used, say, one-tenth as much 5. If The number 2 preceding O 2 and H 2 O is a stoichiometric factor.
The number 1 preceding CH 4 and CO 2 is implied. This indicates that one molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water.
The equation is balanced because the same number of atoms of each element appears on both sides of the equation here one carbon, four hydrogen, and four oxygen atoms. Analogously with the iron-sulfur example, we can say that 16 grams of methane and 64 grams of oxygen will produce 44 grams of carbon dioxide and 36 grams of water. That is, 80 grams of reactants will lead to 80 grams of products. The ratio of reactants and products in a chemical reaction is called chemical stoichiometry.
Stoichiometry depends on the fact that matter is conserved in chemical processes, and calculations giving mass relationships are based on the concept of the mole. One mole of any element or compound contains the same number of atoms or molecules, respectively, as one mole of any other element or compound. By international agreement , one mole of the most common isotope of carbon carbon has a mass of exactly 12 grams this is called the molar mass and represents 6. One mole of iron contains Each of these masses represents 6.
Chemical reaction. Videos Images. Additional Info. Load Previous Page. The conservation of matter. Learn how chemical reactions are balanced through the metaphor of making change. Two people making change for five dollars as a representation of how matter is conserved in a chemical reaction. Load Next Page.
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